Dataset Preview
View in Dataset Viewer
Viewer
The full dataset viewer is not available (click to read why). Only showing a preview of the rows.
The dataset generation failed because of a cast error
Error code: DatasetGenerationCastError
Exception: DatasetGenerationCastError
Message: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 1 new columns ({'text'})
This happened while the json dataset builder was generating data using
zip://articles/10022138.json::/tmp/hf-datasets-cache/medium/datasets/97397538409727-config-parquet-and-info-diseases-risk-factors-art-d155c303/downloads/4aa027453552e0ec442721b83b305b0fd0aa8b25731e45f4dee397e91f0e625e
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)
Traceback: Traceback (most recent call last):
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 2011, in _prepare_split_single
writer.write_table(table)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/arrow_writer.py", line 585, in write_table
pa_table = table_cast(pa_table, self._schema)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/table.py", line 2302, in table_cast
return cast_table_to_schema(table, schema)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/table.py", line 2256, in cast_table_to_schema
raise CastError(
datasets.table.CastError: Couldn't cast
id: string
text: string
to
{'id': Value(dtype='string', id=None)}
because column names don't match
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1577, in compute_config_parquet_and_info_response
parquet_operations = convert_to_parquet(builder)
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1191, in convert_to_parquet
builder.download_and_prepare(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1027, in download_and_prepare
self._download_and_prepare(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1122, in _download_and_prepare
self._prepare_split(split_generator, **prepare_split_kwargs)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1882, in _prepare_split
for job_id, done, content in self._prepare_split_single(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 2013, in _prepare_split_single
raise DatasetGenerationCastError.from_cast_error(
datasets.exceptions.DatasetGenerationCastError: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 1 new columns ({'text'})
This happened while the json dataset builder was generating data using
zip://articles/10022138.json::/tmp/hf-datasets-cache/medium/datasets/97397538409727-config-parquet-and-info-diseases-risk-factors-art-d155c303/downloads/4aa027453552e0ec442721b83b305b0fd0aa8b25731e45f4dee397e91f0e625e
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)Need help to make the dataset viewer work? Open a discussion for direct support.
id
string | text
string |
|---|---|
1 | null |
10022138 | PURPOSE:
The aim of this study was to analyze factors impacting on the survival of pediatric patients with intestinal failure referred for intestinal transplantation (ITx).
METHODS:
Two hundred fifty-seven children (mean age, 3.4+/-0.26 years) with intestinal failure were evaluated for ITx between 1990 and 1998. All patients were dependent on total parenteral nutrition (TPN) for a mean of 31+/-2.7 months. The mean follow-up time from the date of evaluation was 9.2+/-0.9 months.
RESULTS:
Eighty-two (32%) children underwent ITx with a mean waiting time of 10.1+/-1.3 months (simultaneous liver-intestinal allograft in 68% instances). Of the 175 patients who did not undergo transplantation, 120 died, 23 were lost to follow-up, and 32 are alive. Younger patients (< or =1 year) had poorer survival rates than patients older than 1 year (P<.0001). The patients with the worse prognosis were those with necrotizing enterocolitis, and those with the best prognosis were those with Hirschsprung's disease. Patients with "surgical" causes had poorer survival rates than those with "nonsurgical" causes (P<.04). Patients with bridging fibrosis or established cirrhosis had an earlier mortality than patients with portal fibrosis (P<.003). The worst survival rate was found for patients with bilirubin levels of greater than 3 mg/dL (P<.0001), plateletcounts less than 100.000/mL (P<.0001), prothrombin time greater than 15 seconds (P = .03) or partial thromboplastin time greater than 40 seconds (P<.04). Children who at the time of evaluation needed only an isolated intestinal allograft had a better prognosis than those who required a combined liver-intestine allograft (P<.00001). With multivariate analysis independent prognosis risk factors of poor outcome were hyperbilirubinemia and severity of histopathologic damage.
CONCLUSIONS:
Early referral for ITx should occur before the development of liver dysfunction, taking into consideration the aforementioned risk factors that would facilitate the development and ominous evolution to liver failure. |
10022400 | Hypopituitary patients have increased mortality from vascular disease, and in these patients, early markers of atherosclerosis [increased carotid artery intima-media thickness (IMT) and reduced distensibility] are more prevalent. As GH replacement can reverse some risk factors of atherosclerosis, the present study examined the effect of GH treatment on morphological and functional changes in the carotid and brachial arteries of GH-deficient (GHD) adults. Eleven GHD hypopituitary men (24-49 yr old) were treated with recombinant human GH (0.018 U/kg BW x day) for 18 months. IMT of the common carotid artery (CCA) and the carotid bifurcation (CB), and flow-mediated endothelium-dependent dilation (EDD) of the brachial artery were measured by B mode ultrasound before and at 3, 6, 12, and 18 months of treatment, and values were compared with those in 12 age-matched control men. Serum concentrations of lipids, lipoprotein(a), insulin-like growth factor I (IGF-I), and IGF-binding protein-3 (IGFBP-3) were also measured. In GHD men before treatment the IMTs of the CCA [mean(SD), 0.67(0.05) mm] and CB [0.75(0.04) mm] were significantly greater (P < 0.001) than those in control men [0.52(0.07) and 0.65(0.07) mm, respectively]. GH treatment normalized the IMT of the CCA by 6 months [0.53(0.04) mm] and that of the CB by 3 months [0.68(0.05) mm]. The IMT of the carotid artery (CCA and CB) was negatively correlated with serum IGF-I (r = -0.53; P < 0.0001). There was a significant improvement in flow-mediated EDD of the brachial artery at 3 months, which was sustained at 6 and 18 months of GH treatment (P < 0.05). GH treatment increased high density lipoprotein cholesterol at 3 and 6 months, but did not reduce total or low density lipoprotein cholesterol and was without effect on lipoprotein(a). There was no correlation between plasma lipids and changes in IMT or EDD of the arteries examined. In conclusion, GH treatment of hypopituitary GHD men reverses early morphological and functional atherosclerotic changes in major arteries and, if maintained, may reduce vascular morbidity and mortality. GH seems to act via IGF-I, which is known to have important effects on endothelial cell function. |
10022629 | OBJECTIVES:
In the general population, acute upper gastrointestinal hemorrhage (UGIH) is a common problem that results in significant morbidity and mortality. The aim of this study was to determine the etiology, clinical outcome, and risk factors for rebleeding and mortality in a large cohort of human immunodeficiency virus (HIV)-infected patients with acute UGIH.
METHODS:
We reviewed the medical records of consecutive HIV-infected patients with acute UGIH who were referred for an endoscopic evaluation from January 1992 through January 1997 at Bellevue Hospital Center.
RESULTS:
During the 5-yr study period, 297 HIV-infected patients with acute UGIH were evaluated by endoscopy. Gastroduodenal ulcers (25.6%), esophageal ulcers (21.5%), and Kaposi's sarcoma (19.2%) were the three most common causes of acute UGIH. Fifteen percent of patients rebled within 30 days and independent predictors of rebleeding included a CD4 count of <200 cells/mm3, inpatient status, a hemoglobin of <8 g/dl, major stigmata of hemorrhage, and lymphoma. The 30-day mortality from UGIH was 11.4% and a hemoglobin of <8 g/dl, a platelet count of <100,000/mm3, major stigmata of hemorrhage, rebleeding within 30 days, and lymphoma were independent predictors of mortality. The introduction of protease inhibitors in December 1995 resulted in a reduction in 30-day mortality from 13.5% to 4.4% (p = 0.04) without affecting the etiology of UGIH or the incidence of rebleeding.
CONCLUSIONS:
Acute UGIH in HIV-infected patients is most commonly due to gastroduodenal ulcers, esophageal ulcers, and Kaposi's sarcoma. In this patient population, the introduction of protease inhibitors has had a positive impact on the outcome of UGIH. |
10022640 | OBJECTIVE:
Our aim was to study the frequency, severity, and outcome of patients with Crohn's disease and ulcerative colitis treated with 6-mercaptopurine (6MP) who developed shingles during treatment, and to recommend management. While varicella can be severe in young people immunocompromised by steroids, the incidence of herpes zoster in older people with inflammatory bowel disease (IBD) and whether its severity is influenced by 6MP and azathioprine are unknown.
METHODS:
Data were collected from our IBD Center on 550 patients with IBD to identify those who developed shingles while on 6MP, its severity, the dose and duration of 6MP, and the management of the 6MP.
RESULTS:
Twelve of 550 patients with IBD treated with 6MP developed shingles. In two with herpes zoster ophthalmicus the pain was prolonged, and one patient developed encephalitis which was brief and uncomplicated; in nine patients the course was benign. Acyclovir should be the treatment of choice even though it was available in only three cases.
CONCLUSIONS:
Shingles occurs more often in IBD patients treated with 6MP than in those who are not, but the course is usually benign and there has been no mortality. The 6MP should be stopped temporarily until severity is established but if the underlying disease warrants further treatment the 6MP should be restarted. |
10022644 | OBJECTIVE:
The purpose of this study was to evaluate the level of gallbladder cancer risk associated with polyps and stones of the gallbladder by ultrasound examinations.
METHODS:
We investigated abdominal ultrasonographic findings for gallstones and polyps of the gallbladder and the relationship of these findings to malignancy in 194,767 asymptomatic participants in health screening examinations.
RESULTS:
Gallstones were detected in 7,985 participants (4.1%), at a prevalence of 5.3% in male and 4.5% in female participants. The prevalence was highest in the participants' seventh decade, followed by the sixth and the fifth decades, in both male and female participants. Polyps were found in 10,926 (5.6%), at a prevalence of 6.9% in the male and 4.5% in the female participants. In the male participants, prevalence was highest in the fourth decade, followed by the third and the fifth decades, whereas in the female participants it was highest in the fifth decade, followed by the fourth and third. High prevalence of polyps > or = 10 mm in diameter was found in the fifth to seventh decades in both sexes. Nineteen participants (0.01%) were diagnosed as having gallbladder cancer, and many of them were in the sixth or seventh decade in both sexes. Patients with stones showed a higher prevalence of gallbladder cancer. This difference was shown to be statistically significant by age-adjusted analysis (p < 0.01). The age distribution of the participants with polyps > or = 10 mm in diameter was correlated with that of patients diagnosed with gallbladder cancer. Furthermore, polyp incidence was significantly related to cancer by statistical analysis (p < 0.01).
CONCLUSION:
These results suggest an association between gallstone or polyp of the gallbladder and increased risk of malignancy, implying that an etiological association may also exist. |
10023013 | To investigate the possible role of previous medical history and previous medications as risk factors for hairy cell leukaemia (HCL) we performed a population based case-control study on 121 male HCL patients and 484 controls. The data were collected through a self-administered mailed questionnaire. Elevated odds ratios (OR) were found for a history of appendicitis [OR 1.9; 95% confidence interval (CI) 0.9-4.2] and pneumonia (OR 2.9; CI 0.9-9.6). We found a reduced risk for HCL associated with a history of myocardial infarction (OR 0.3; CI 0.4-2.5), hypertension (OR 0.6; CI 0.3-1.2) and thromboembolic disease (OR 0.6; CI 0.1-2.7). Reduced OR was also associated to a history of diabetes mellitus (OR 0.6; CI 0.1-2.9) and a diagnosis of hyperlipidemia (OR 0.8; CI 0.2-3.6). HCL is an indolent disease with a clinical course of many years and it can not be excluded that the disease leads to metabolic changes, resulting in a changed risk for these diagnoses. When the role of previous medications were investigated, increased OR was found for NSAID (OR 3.4; CI 1.1-10.2). Decreased OR was found for the anti-coagulative agent warfarin (OR 0.4; CI 0.1-1.5). A history of a previous malignancy preceeding the diagnosis of HCL as reported to the Swedish Cancer Registry yielded an increased OR of 3.2 (CI 1.2-8.5). All results must be interpreted with caution, as there is a possibility of misclassification. Medications is difficults to remember, particularly several years after consumption. As many comparisons were made, there is always a possibility of correlations occuring by chance. |
10023133 | This population-based case-control study was conducted in three counties in western Washington state (USA) between 1990 and 1994 to assess the association between amyotrophic lateral sclerosis (ALS) and several hypothesized risk factors, including a family history of neurodegenerative diseases, physical trauma (fractures, electrical shocks, and surgeries), rural residence, travel, and medical history. One hundred seventy-four cases with ALS, newly diagnosed by neurologists, were identified through several case-finding methods. Two controls (n = 348), who were matched to each case by gender and age (+/-5 years), were identified through random digit telephone dialing or Medicare lists. Exposure data were collected through structured in-person interviews. A greater proportion of cases (2. 3%) than controls (0.9%) reported a first-degree relative with ALS, resulting in an odds ratio of 3.1 (95% CI, 0.6-15.7). For a positive family history of ALS among second-degree relatives, the odds ratio was 4.0 (95% CI, 1.0-16.6). Overall, reports of first- or second-degree relatives with ALS yielded a significantly elevated odds ratio of 3.3 (95% CI, 1.1-9.9). No association was found with a family history of Alzheimer's disease or Parkinson's disease, or with a family history of the neurodegenerative diseases as a group. No significant associations were demonstrated for any of the other factors analyzed, including a history of fractures, electrical shocks, or surgeries, a history of residence in rural areas, a history of travel to areas in the western Pacific where ALS is endemic, and a medical history of polio, polio immunization, or tetanus immunization. |
10023355 | OBJECTIVE:
To identify clinical epidemiological correlates of cervical and vaginal infections and assess alternative algorithms, including two new reproductive tract infection (RTI) algorithms, for syndromic management of these infections.
DESIGN, SETTING AND SUBJECTS:
We prospectively studied clinical manifestations and risk correlates of cervical and vaginal infections in a randomly sampled group of 779 female patients seeking evaluation for a new problem at a Seattle STD clinic.
METHODS:
One experienced clinician performed standardised history, physical examination, and microscopy. Reference laboratories performed microbiological tests. Three levels of retrospective evaluation of algorithms included risk assessment and symptom review (RAS) alone; addition of speculum and bimanual examinations; and further addition of microscopy.
RESULTS:
(1) Chief complaint of abnormal vaginal discharge predicted a significantly lower rate of gonorrhoea (GC) or chlamydial infection (CT) than rates observed with no complaint of vaginal discharge. Only the elicited symptom of yellow vaginal discharge (not the more common symptoms of increased or malodorous vaginal discharge) predicted GC or CT. Chief complaint of abnormal vaginal discharge itself predicted trichomoniasis (TV) and bacterial vaginosis (BV), not cervical infection. Candida albicans was strongly associated with the chief complaint of vulvar pruritus, not with the chief complaint of abnormal vaginal discharge. (2) Applying these algorithms in STD clinics only to women with the chief complaint of abnormal vaginal discharge, rather than to all women, decreases sensitivity for GC or CT, without increasing positive predictive value (PPV). Criteria for inclusion of patients have more effect on the performance of these algorithms than do the levels of evaluation used. (3) A modified World Health Organisation (WHO) algorithm applied only to patients with symptoms of vaginal discharge, involving treatment of RAS positives for cervical infection, followed by treatment of vaginal infections and cervicitis based on examination of RAS negatives and positives, had a sensitivity of 50% and PPV of 33% for cervical infection, and very low sensitivity for BV, TV, and for vulvovaginal candidiasis (VVC). (4) An RTI algorithm derived from these data, and applied to all STD patients, involving RAS and examination of all RAS negatives, provided treatment to all cases of BV and TV associated with symptoms of vaginal discharge; treatment of all VVC associated with symptoms of vulvar pruritus; treatment for GC and GT to all RAS positives (using easily elicited risk factors) and to RAS negatives with signs of cervicitis or PID. This algorithm had a sensitivity of 87% and a PPV of 33% for GC or CT in this population, with its 24% prevalence of GC or CT. The sensitivity for BV, TV, and VVC greatly exceeded that of the modified WHO algorithm. (5) A modified RTI algorithm, involving examination rather than treatment of RAS positive women, no examination of RAS negatives, decreased the sensitivity for cervical infection to 55% but increased the PPV to 51%.
CONCLUSIONS:
Syndromic management of vaginal discharge offers relief of symptoms, prevention of transmission of trichomonas, and perhaps prevention of complications of BV. The 51% PPV of the modified RTI algorithm probably would warrant treatment and partner notification for GC and CT in settings with similar rates of GC and CT where more specific tests are lacking. However, as the prevalence of GC or CT decreases, the ratio of uninfected to infected who receive treatment with these algorithms would increase greatly, making the algorithms potential victims of their own success. |
10023365 | BACKGROUND:
Detection and management of gonococcal and/or chlamydial infections in women is a challenge, particularly in developing countries where laboratory tests are not always available. The World Health Organisation (WHO) has developed a risk assessment approach to identify cervical infections among women complaining of vaginal discharge. We have evaluated this approach as a screening strategy among women attending an urban antenatal clinic (ANC) in Tanzania.
OBJECTIVES:
(i) To measure the prevalence of pathogens associated with sexually transmitted diseases (STD) and reproductive tract infections (RTI) in an urban population of ANC attenders in Tanzania; (ii) to examine characteristics of pregnant women associated with cervical infections; and (iii) to evaluate the performance of a WHO risk assessment algorithm and alternative risk scores for the detection of cervical infections in pregnant women.
METHODS:
A systematic sample of 660 pregnant women reporting for routine antenatal care at an urban clinic was enrolled. Women were interviewed by a nurse, who applied the WHO risk score. They were referred to a study room for interview about sociodemographic and behavioural factors, examination, and sampling for Neisseria gonorrhoeae, Chlamydia trachomatis, Trichomonas vaginalis, Candida albicans, and bacterial vaginosis. Sensitivity, specificity, positive predictive value (PPV), and theoretical cost per true case treated were estimated for the diagnosis of cervical infection with N gonorrhoeae and/or C trachomatis for the WHO and other risk scores.
RESULTS:
The prevalence of any vaginal or cervical infection was 68%. Prevalence rates of various pathogens were: C albicans 39%, T vaginalis 16%, bacterial vaginosis 24%, N gonorrhoeae 2.3%, C trachomatis 5.9%, any cervical infection (N gonorrhoeae and/or C trachomatis) 7.4%. The WHO score identified only five of 49 women with N gonorrhoeae and/or C trachomatis (sensitivity 10.2%). The specificity and the PPV were 92% and 9.8% respectively. The theoretical cost per true case treated on the basis of the WHO score was over $18. Several risk factors were associated with cervical infection on univariate analysis, but only six remained significant at the 10% level after multivariate analysis. These were: never use of contraceptives (OR 3.09), more than one partner in the past 3 months (OR 3.32), partner with symptoms of genital discharge syndrome (GDS) (OR 7.55), frothy vaginal discharge (OR 1.88), 5-19 polymorphonucleocytes per high power field on cervical smear (OR 3.28), or more than 20 polymorphonucleocytes per high power field (OR 16.08), and wet preparation showing evidence of T vaginalis infection (OR 1.96). Scores based on these variables failed to attain high sensitivities or PPVs (all below 40%) although the costs per true case treated were cheaper than for the WHO score.
CONCLUSION:
Risk assessment for the screening and management of N gonorrhoeae and/or C trachomatis among women presenting at routine antenatal services appears feasible and acceptable, but of limited value in this population because of its low sensitivity. The optimal risk score may vary considerably from one place to another. The quest for simple, cheap, and reliable tests to diagnose N gonorrhoeae and C trachomatis infections still remains a high priority on the international STD technology research agenda. |
10023639 | The existence of a human immunodeficiency virus (HIV)-associated nephropathy (HIVAN) as a distinct disease entity characterized by glomerulosclerosis is well established in North America and Western Europe. Although the large number of HIV-infected cases overwhelm the Asian countries, no cases of HIVAN are documented in the literature. We studied 26 cases of HIV-infected Thai patients with proteinuria greater than 1.5 g/d of protein during 1995 and 1996. None of the patients were treated with antiretroviral drugs at the time of renal biopsy. Intravenous drug addiction and sexual transmission were risk factors in 11 and 15 patients, respectively. Pathological examinations were performed by light microscopic and immunoperoxidase study. Mesangial proliferative glomerulonephritis was found in 17 cases, immunoglobulin A (IgA) nephropathy in 2 cases, and diffuse proliferative glomerulonephritis and interstitial nephritis secondary to cryptococcal infection in 2 cases each. One case each had membranous glomerulopathy, membranoproliferative glomerulonephritis, and granulomatous interstitial nephritis secondary to tuberculosis. The renal pathological findings of HIVAN with the unique features described in previous literature were not evident in these patients. Although the data in this study are limited to 26 HIV-infected Thai patients, we believe that HIVAN is uncommon in the Asian HIV-infected population. |
10024210 | BACKGROUND:
Cost effective use of new vaccines against pneumococcal disease in children requires detailed information about the local epidemiology of pneumococcal infections.
METHODS:
Data on 393 culture-confirmed cases of invasive pneumococcal infection in children (<17 years) hospitalized in Swiss paediatric clinics were collected retrospectively for the years 1985-1994.
RESULTS:
Meningitis (42%) was most frequent, followed by pneumonia (28%) and bacteraemia (26%). The overall annual incidence was 2.7 cases per 100000 children <17 years old and 11 cases per 100000 children <2 years old. Annual incidence rates were stable over the study period. Lethality was high for meningitis (8.6%) and bacteraemia (8.9%). A history of basal skull fracture was reported in 3.3% of children with pneumococcal meningitis. Residence in a rural region was associated with an increased risk of pneumococcal infection (relative risk = 1.45, 95% confidence interval: 1.01-2.00).
CONCLUSIONS:
Paediatric, invasive pneumococcal disease seems to be less frequent in Switzerland than in other European and non-European countries. This may be due to differences in diagnostic strategies and lower frequency of risk factors such as the use of day care. Children with a history of basal skull fracture are at increased risk for pneumococcal meningitis. Further investigation of the association of invasive pneumococcal infection with rural residence and the use of antibiotics for upper respiratory tract infections might give new insight into the dynamics of Streptococcus pneumoniae infection and the development of antibiotic resistance. |
10024220 | BACKGROUND:
It has recently been suggested that measles infection may reduce the risk of atopy.
OBJECTIVE:
To study the independent effect of measles infection and measles vaccination on the occurrence of hay fever in a British national birth cohort.
METHODS:
In over 6000 children born in 1970, details of immunizations and childhood diseases were collected by parental interviews at ages 5, 10 and 16 years, and hay fever within the past year at age 16 years.
RESULTS:
In univariate analysis, hay fever was less common in those contracting measles infection than in those not infected (OR 0.86, 95% CI 0.76-0.96), and more common in those given measles vaccination than in those not vaccinated (OR 1.16, 95% Cl 1.03-1.31). However, these effects were strongly confounded by birth order, which was closely associated with the likelihood of receiving measles vaccination and with the risk of hay fever. A strong interaction between the effects of measles vaccination and infection, and birth order was found, such that in those with many older sibling contacts, hay fever was significantly and independently reduced in relation to both measles infection and measles vaccination relative to those who were neither infected nor vaccinated.
CONCLUSIONS:
Both measles infection and measles vaccination in childhood appear to reduce the risk of hay fever in children with multiple older sibling contacts. Differential exposure or response to the measles virus may explain the effect of birth order on the occurrence of allergic disease. |
10024836 | BACKGROUND:
Special bespoke footwear, according to F. I. Tovey, can prevent foot ulceration in patients with diabetic neuropathy. Its main features are: extra depth, shock-absorbing insole, and no toe-cap. Such medical footwear may also be produced industrially for feet without major deformities. However, its clinical efficacy needs to be demonstrated to get the approval by the European Community.
PATIENTS AND METHODS:
A follow-up study was set up in 57 diabetic patients with a history of neuropathic foot ulceration, to investigate the efficacy of the industrially produced special "Diabeticus" shoe (Thanner GmbH, Höchstädt/Germany).
RESULTS:
After a mean of 12 (SD 6) months, 26 ulcer relapses were noted. Of these, 8 occurred to 30 patients wearing the protective shoes > 8 hours/day, and 18 occurred to 27 patients wearing normal shoes > 8 hours/day (p < 0.02, Log rank). The relapse rate was unrelated to the appreciably high frequency of podiatry in both groups (median 36 vs 45 days; n.s.).
CONCLUSION:
The special shoes under study during a 12-month period proved to protect against neuropathic diabetic foot ulcer relapses, when worn more than 8 hours per day. |
10025080 | In fibromyalgia as well as in low back pain we frequently find disturbances of the posture of vertebral column clinically and radiologically. Also, reduction in the mobility of whole spine and localized movement impairments in both conditions was present. It is likely that the disturbances are responsible for the first manifestations of fibromyalgia in a single localization, especially in lumbar and cervical regions. |
10025085 | Although familial occurrence of fibromyalgia syndrome (FMS) has been commonly observed, data on a genetic role in this condition are limited. A few studies have reported familial aggregation and association with HLA. We have studied genetic linkage of FMS with HLA in multicase families, and found a rather weak linkage of FMS with HLA (P < 0.029). |
10025093 | The prevalence of FM in the general population is estimated at 2%. FM is among the three most common diagnoses in ambulatory adult rheumatology practice. To study the degree of depression, the familial history of depression and FM, as well as the psychological distress in our FM population, we mailed a standardized questionnaire to 304 FM patients. The response rate was 33%. We found BDI scores higher than 21 in 27% of the patients indicating clinical relevant depression. The patients had high levels of global distress measured with the SCL-90-R as well as elevated scores in the subscales. Twenty three percent had a familial history of depression, 46% a familial history of FM, and 46% had been diagnosed with depression in the past. |
10025094 | Fibromyalgia patients hardly suffer from major psychiatric illnesses. Most often, persistent somatoform pain disorder (ICD-10) and dysthymia are identified by psychiatric assessment. Features of "pain proneness" can also be found regularly, which can explain the elevated levels of stress observed in FMS. Repeated traumatic experiences during childhood and as adults can be discovered in many cases, which helps to understand some of the difficulties met in psychotherapy with FMS patients. Modified psychotherapy techniques are recommended using pain-centered behavioral methods initially, and progressing only later to an insight orientated approach. |
10025190 | About 1% of pregnant women have concomitant cardiac disease. An understanding of the impact of the physiologic changes associated with pregnancy upon structural cardiac disease is essential for proper counseling and management of these complex patients, which should be treated in a specialized team with experience in congenital as well adult disease. The availability of echocardiography provides information about disease aetiology, accurate and non invasive assessment of severity and means of monitoring progression. Contraindication for pregnancies still remain severe pulmonary artery hypertension and Eisenmenger-syndrome and severe surgical non corrected cyanotic disease as well. Postrheumatic stenosis, even when previously asymptomatic, can lead to pulmonary edema. Although pregnancies with asymptomatic regurgitant lesions are better tolerated. The best procedure in severe aortic insufficiency still remains controversial. Patients with Marfan syndrome and aortic root dilatation are at risk for aortic dissection and are difficult to manage. In patients with artificial valves continuing anticoagulation with warfarin is proposed in Europe. Due to accelerated valve deterioration during pregnancy the use of bioprotheses in women who need valvular heart surgery before pregnancy necessitate later valve replacement again and perhaps an autograft or homograft could be an alternate approach. Bacterial endocarditis in pregnancy shows a low incidence and is often associated with prior history of rheumatic or congenital heart disease. Therefore prophylaxis is recommended. There is an increase in the incidence of congenital heart disease among the offsprings of affected parents. Fetal echocardiography, in combination with a multidisciplinary postnatal approach, can be used in the successful treatment of severe form of congenital heart disease. |
10025479 | During 1987-1996, over 22,000 tuberculosis cases were reported in Texas, at an average annual incidence rate of 12.5 cases per 100,000 population. Counties with the highest rates were located along the Mexico-Texas border and in northwestern Texas. Nine percent of cases were resistant to at least one of the five first-line antituberculosis drugs used for treatment. Almost 5 percent (4.6%) were resistant to isoniazid, either alone or in combination with other antibiotics; 2.3% were resistant to rifampin; and only 1.3% were resistant to both isoniazid and rifampin. Being a recurrent case, being foreign-born, being 20-39 years of age, and residing in a Mexico-Texas border county were independent risk factors for isoniazid resistance and rifampin resistance. Tuberculosis patients with human immunodeficiency virus (HIV) infection were more likely to have rifampin resistance and less likely to have isoniazid resistance than patients without HIV infection. Factors associated with multi-drug-resistant tuberculosis included a history of previous tuberculosis (relative risk (RR) = 4.91, 95% confidence interval (CI) 3.5-6.8), non-US birth (RR = 2.69, 95% CI 2.1-3.5), age younger than 20 years (RR = 1.97, 95% CI 1.1-3.5), age 20-39 years (RR = 1.82, 95% CI 1.3-2.6), and residence in a Mexico-Texas border county (RR = 2.33, 95% CI 1.8-3.1). |
10025742 | BACKGROUND:
Nonmelanoma skin cancer occurs frequently in organ transplant recipients, but the relative importance of different immunosuppressive therapy regimens is unclear.
OBJECTIVE:
We studied the risk of skin cancer in the complete, single-center Norwegian cohort of kidney and heart transplant recipients (n = 2561).
METHODS:
We determined cancer risk estimation by means of standardized incidence ratios and multivariate Cox regression.
RESULTS:
Transplant recipients had an increased risk of cutaneous squamous cell carcinoma (SCC) (65-fold), malignant melanoma (3-fold), and Kaposi's sarcoma (84-fold), and of lip SCC (20-fold), compared with the general population. After adjustment for age, kidney transplant recipients receiving cyclosporine, azathioprine, and prednisolone had a significantly (2.8 times) higher risk of cutaneous SCC relative to those receiving azathioprine and prednisolone. After adjustment for age and type of immunosuppressive regimen, heart transplant recipients had a significantly (2.9 times) higher risk than kidney transplant recipients.
CONCLUSION:
The risk of cutaneous SCC, malignant melanoma, Kaposi's sarcoma, and lip SCC is increased in kidney and heart transplant recipients. The risk of posttransplant cutaneous SCC is related to the degree of immunosuppression caused by long-term immunosuppressive therapy. |
10025803 | Fourteen of 320 patients (4%) admitted with Guillain-Barré syndrome (GBS) died as a direct result of the illness. Deaths most commonly resulted from ventilator-associated pneumonia. In comparison with 101 other patients with severe GBS admitted to the intensive care unit, the patients who died were older (p = 0.006) and more likely to have underlying pulmonary disease (p = 0.004). In a specialized center, the primary event leading to death in GBS was ventilator-associated pulmonary infection, predominantly in elderly patients with significant comorbidity. |
10025855 | Kaposi's sarcoma (KS) has been reported after solid organ transplantation mostly in recipients of renal, liver, heart, and bone allografts. We describe the first case of a patient with lung transplantation who developed KS of the skin, but also of the lung graft. The tumors were localized to places of previous trauma, implying the involvement of a Koebner phenomenon. Moreover, a polymerase chain reaction assay revealed the presence of DNA sequences of herpesvirus 8 (HHV-8) on tissue of the cutaneous KS. Serological tests showed HHV-8 seronegativity of the graft donor and HHV-8 seropositivity of the patient before lung transplantation suggesting that the latter was already infected before the surgery and that immunosuppression resulted in the development of KS. This case report raises the question of the prevalence of HHV-8 in candidates for transplantation and organ donors, and of the value of an antiviral prophylaxis to lower the risk of KS. |
10025886 | To determine the clinicohematological factors predictive for the appearance of major vascular complications (MVC) in patients with essential thrombocythemia (ET), 148 consecutive such patients were retrospectively assessed for the development of MVC during a median follow-up of 58.5 months. Seventy-seven patients had vascular risk factors, and 37 a history of MVC at ET diagnosis. Forty-nine MVC were registered in 33 patients during the follow-up period. The actuarial probability of MVC was 27% at 6 years in the whole series, 35.6% for patients above 60 years, and 21.4% for patients younger than 60 years, whereas only one of the 36 patients younger than 45 years had MVC. At multivariate analysis, age >60 years, history of major ischemia and hypercholesterolemia were the variables associated with an increased MVC risk. These results suggest that all ET patients above 60 years should be treated, whereas in younger patients treatment decisions should be primarily based on the existence of risk factors for MVC. |
10025888 | Thirty-one patients (20 male and 11 female; median age 51 years (16-79)) with high-risk acute myeloblastic leukemia (AML) (20 refractory AML and 11 secondary AML (s-AML) (four to myelodysplastic syndrome, five to chemo/radiotherapy, one to aplastic anemia and one blastic chronic myelogenous leukemia (B-CML)) were treated with CBDCA (300 mg/m2/day x 5 days in continuous i.v. infusion) plus intermediate-dose Ara-C (500 mg/m2/day x 3 days in rapid i.v. infusion). Nine patients (29%) achieved CR (five s-AML (three myelodysplastic syndromes, one CML and one ALL) and four refractory AML) and 11 patients had resistant disease. There were 11 early deaths (35%). Median disease-free survival of the nine responders was 4 months. The main toxicity was hematological, febrile episodes took place in nearly all the patients (96%). The CBDCA plus Ara-C regimen showed an evident antileukemic activity in high-risk leukemia. However, the lack of long-term disease-free survivors shows the need for innovative postremission strategies. The high initial response rate seen in AML secondary to myelodysplastic syndromes (MDS) warrants further investigation of CBDCA in combination regimens for MDS patients. |
10026687 | Hansen's disease (leprosy) is rare in Australia and usually imported from endemic areas. We report a 23-year-old white male with multibacillary leprosy who had lived all his life in North Queensland and initially appeared to have no risk factors. However, historical records revealed his grandfather to have been infected; because of stigma, this was unknown to the patient. As Hansen's disease has an incubation period of years, isolated cases may still occur as a result of previous endemicity in Queensland. |
10026712 | Establishing an underlying cause and treatment plan for patients with pulmonary hypertension presents a significant challenge to practicing physicians. Doppler echocardiography is a simple, cost-effective tool for detecting pulmonary hypertension and evaluating right ventricular function. Nonspecific therapy (use of digoxin and diuretics, anticoagulation) for pulmonary hypertension and right ventricular failure achieves a degree of symptomatic improvement and should be considered in patients with moderate to severe disease. CTEPH should be considered in patients with dyspnea. Because severs forms of pulmonary hypertension usually are not discovered until late in the disease course, a high level of suspicion is required when evaluating symptoms and risk factors consistent with pulmonary vascular disease. Pulmonary hypertension is classified as idiopathic, or primary, when no secondary cause can be identified. Primary pulmonary hypertension is a devastating disease that largely affects young women. Significant advances in treatment have been made and will be discussed in detail in part 2 of this article. |
10027101 | An incidence study on nosocomial infections in critically ill infectious disease patients was carried out in the intensive care unit (ICU) of a university hospital for infectious diseases over a 7-year period (1 January 1990 to 31 December 1996). A total of 660 patients who stayed in the ICU for over 48 h were prospectively observed. The patients were divided into two groups: one with central nervous system infections (442 patients) and the other with other severe infections (218 patients). The risk of nosocomial sepsis and pneumonia was significantly higher in patients suffering from severe central nervous system infections. The incidence of sepsis was 24.2% vs 11.4% (relative risk 1.95; 95% confidence interval 1.32-2.89); the incidence of pneumonia was 30.5% vs 14.7% (relative risk 2.09; 95% confidence interval 1.47-2.96). The incidence of urinary tract infection was 14.3% vs 13.3% (relative risk 1.07; 95% confidence interval 0.71-1.61). Density rates of nosocomial septic episodes were 21.1 +/- 37.1 vs 11.7 +/- 32.4 episodes/100 central venous-line days (P < 0.006). Nosocomial pneumonia occurred only in mechanically ventilated patients (36.9 +/- 61.2 vs 28.5 +/- 65.8 episodes per 1000 ventilatory days, P = 0.012). Nosocomial urinary tract infection occurred only in patients with urinary catheters (11.6 +/- 60.7 episodes/1000 urinary catheter days vs 18.7 +/- 90.1, P = 0.886). Multivariate regression analysis identified age, diagnosis of CNS infection, duration of urinary tract catheterization, the use of central venous lines and mechanical ventilation as independent risk factors of nosocomial sepsis. Duration of mechanical ventilation, use of steroids and diagnosis of CNS infection were independent risk factors of nosocomial pneumonia. A subanalysis identified tetanus patients to be at particular risk of nosocomial infections. |
10028191 | OBJECTIVE:
To identify risk factors for contracting plague among the three to 16 year old age group.
DESIGN:
A matched case control study, carried out in two parts.
SETTING:
Nkayi District--a plague endemic area in Zimbabwe.
SUBJECTS:
A total of 86 cases were randomly selected from a line listing of all reported plague cases in the district. Two neighbourhood controls were selected from households at least 500 m on either side of the case household.
MAIN OUTCOME MEASURES:
Maximum likelihood estimate of the odds ratio (OR) for the 17 risk factors studied (grouped as personal, environmental, domestic animals and rat reports).
RESULTS:
Risk factors which were significantly associated with contracting plague were having a sick cat in the household (OR 3.4, 95% CI 1.1 to 13.0), herding cattle (OR 1.7, 95% CI 1.0 to 3.0), and age 10 years or older (OR 2.2, 95% CI 1.2 to 4.1). In a logistic model, only having a sick cat was found to be independently associated with being a case (OR 3.9, 95% CI 1.3 to 12.2).
CONCLUSION:
The presence of a sick domestic cat was identified as a risk factor for acquiring bubonic plague during this outbreak. Communities should be informed that sick cats may act as a warning of potential plague, and that if cats become sick they should be removed from the household. |
10028202 | The incidence of allergy to aldehydes (formaldehyde, glutaraldehyde, glyoxal) was examined in 280 health care workers suffering from skin lesions. Allergy was diagnosed in 64 (22.8%) patients. The majority of them (85.9%) were sensitive only to 1 aldehyde. Formaldehyde caused allergy slightly more frequently (13.9%) than glutaraldehyde (12.4%). Only 5 (1.9%) patients were sensitive to glyoxal. The irritant effect of aldehydes to the rabbit eye and skin was tested by the Draize and OECD methods. Formaldehyde and glutaraldehyde showed stronger irritant effect than glyoxal. The sensitizing activity of aldehydes was also confirmed in guinea pigs (using the Maximization Test and the OECD methods). Formaldehyde showed the strongest and most persistent reactions. Significantly higher eosinophil and basophil counts were found in the blood samples of the sensitized guinea pigs. Cytotoxicity of glutaraldehyde and glyoxal was tested on mouse 3T3-L1 fibroblasts by the Neutral Red Uptake and MTT Reduction Assay. It was shown that both aldehydes were cytotoxic, and that the cytotoxic effect of glutaraldehyde was stronger than that of glyoxal. |
10028607 | OBJECTIVES:
Genital infection particularly bacterial vaginosis (BV) increases the relative risk of prematurity. Detection of disturbances of vaginal milieu at an early stage and the use of suitable countermeasures such as intervention with antimicrobial substances, e.g. clindamycin, can reduce the preterm birth rate, provided the diagnosis is made early enough.
STUDY DESIGN:
Since October 1996 pregnant women being given prenatal care in 16 of the 29 outpatient offices in Erfurt, have been informed about the Prematurity Prevention Programme and have been offered to take part and to perform self-measurements of their vaginal pH twice a week in order to screen for any disturbances in the vaginal milieu. Special CarePlan-VpH gloves (Selfcare, Oberhaching) were used to identify patients a risk (pH > 4.7). The pregnant women taking part in the programme were instructed to see their physician immediately, if abnormal values were present, in order to get them confirmed and to start lactobacillus acidophilus therapy (Gynoflor, Nourypharma, Oberschleissheim) or, in case of BV, to treat with clindamycin cream (Sobelin, Upjohn, Erlangen) i.vag. Patients being given prenatal care in the 13 outpatient offices not participating and other pregnant women in Erfurt who were not interested in the programme served as control group.
RESULTS:
Up to now 59 out of 314 women in the intervention group have been identified as risk cases (p > or = 4.7). 52 of them were treated with a lactobacillus preparation, and 19 additionally with clindamycin cream, 3 patients refused to have any therapy. In this ongoing study the prematurity rate was 8.3% in the self-measurement/intervention group vs. 13.0% in the control group (n = 1,842); 0.3% vs. 3.3% of the neonates belonged to the group of very early prematures with a gestational age of < 32 + 0 weeks (p < 0.01). PROM was registered in 22.3% vs. 32.1% (p < 0.001) respectively.
CONCLUSION:
Self-measurement of vaginal pH at close intervals, as recommended by Saling, leads to the early identification of women at risk for prematurity. Earliest possible intervention by the obstetrician appears to result in reducing the rate of prematures and in particular of very early prematures (< 32 + 0 weeks). |
10028980 | BACKGROUND:
The study tested the hypothesis that community-level control of sexually transmitted disease (STD) would result in lower incidence of HIV-1 infection in comparison with control communities.
METHODS:
This randomised, controlled, single-masked, community-based trial of intensive STD control, via home-based mass antibiotic treatment, took place in Rakai District, Uganda. Ten community clusters were randomly assigned to intervention or control groups. All consenting residents aged 15-59 years were enrolled; visited in the home every 10 months; interviewed; asked to provide biological samples for assessment of HIV-1 infection and STDs; and were provided with mass treatment (azithromycin, ciprofloxacin, metronidazole in the intervention group, vitamins/anthelmintic drug in the control). Intention-to-treat analyses used multivariate, paired, cluster-adjusted rate ratios.
FINDINGS:
The baseline prevalence of HIV-1 infection was 15.9%. 6602 HIV-1-negative individuals were enrolled in the intervention group and 6124 in the control group. 75.0% of intervention-group and 72.6% of control-group participants provided at least one follow-up sample for HIV-1 testing. At enrolment, the two treatment groups were similar in STD prevalence rates. At 20-month follow-up, the prevalences of syphilis (352/6238 [5.6%]) vs 359/5284 [6.8%]; rate ratio 0.80 [95% CI 0.71-0.89]) and trichomoniasis (182/1968 [9.3%] vs 261/1815 [14.4%]; rate ratio 0.59 [0.38-0.91]) were significantly lower in the intervention group than in the control group. The incidence of HIV-1 infection was 1.5 per 100 person-years in both groups (rate ratio 0.97 [0.81-1.16]). In pregnant women, the follow-up prevalences of trichomoniasis, bacterial vaginosis, gonorrhoea, and chlamydia infection were significantly lower in the intervention group than in the control group. No effect of the intervention on incidence of HIV-1 infection was observed in pregnant women or in stratified analyses.
INTERPRETATION:
We observed no effect of the STD intervention on the incidence of HIV-1 infection. In the Rakai population, a substantial proportion of HIV-1 acquisition appears to occur independently of treatable STD cofactors. |
10029512 | In Canada, glaucoma is the second leading cause of blindness in people aged 50 and over, with primary open-angle glaucoma (POAG) accounting for 90% of all cases. Prevalence of POAG increases with age, and the condition is found more commonly among blacks than whites. Elevated intraocular pressure is an important risk factor for the disease; however, its positive predictive value for the presence of disease is poor. Prevalence of primary angle-closure glaucoma also increases with age, occurs more frequently among the Inuit and Asians, and has been reported to be more common among women. There are various diagnostic methods used to determine the presence or absence of glaucoma, but none can effectively identify the disease in its early stages unless routine screening is conducted. Current treatment of glaucoma is aimed at lowering intraocular pressure, which usually, but not always, stops disease progression. |
10029985 | BACKGROUND:
Iquitos Peru, a densely populated port city housing both a large military base and a booming tourist industry, provides a thriving market for commercial sex and, consequently, sexually transmitted disease (STD). The purpose of this study was to characterize the prevalence of gonococcal and chlamydial infections among commercial sex workers (CSWs) and to correlate those findings with social/behavioral characteristics.
METHODS:
One hundred CSWs, recruited through street and brothel outreach, were administered questionnaires. Urine specimens were collected for gonorrhea and chlamydia testing using ligase chain reaction assays.
RESULTS:
Twenty-eight percent of CSWs were positive for chlamydia (22%) or gonorrhea (14%). Registered CSWs were more likely to have worked more than 5 years (p = 0.03), report 10 or more partners (p = 0.002), and work in brothels (p < 0.001). Significant associations were also noted between infection status and age, with adolescents at increased risk (odds ratio [OR] = 4.13, p = 0.001), and duration of employment, with those employed less than 5 years at increased risk (OR = 3.72, p = 0.04). The latter association, however, was because of age. Also, most CSWs believed themselves to be at no/small risk or didn't know their risk of future gonococcal infection (30%/12% and 25%, respectively) and AIDS (25%/8% and 35%, respectively), with 11% perceiving AIDS as more of a threat.
CONCLUSIONS:
High infection rates, lack of knowledge regarding STD/HIV risk assessment, and other high-risk behavior prevalent among this population stress the need for STD intervention. The study further suggests that educational/risk assessment programs and risk reduction interventions could be successful. |
10030062 | INTRODUCTION:
The occurrence of American cutaneous leishmaniasis in the region of the Paraiba valley and the Northern shore of the State of S. Paulo, Brazil, is studied by remote sensing satellite imagery and maps of the region.
METHOD:
The places where infections might have occurred were plotted on a false color composition made up of Landsat TM-3, 4 and 5 band images, the relevant vegetation (shrubs and trees) has been identified and correlations were sought for those areas seen as areas of risk for the disease and the environmental characteristics and their changes. The maps made it possible to add to the composite image the creeks and the contours of the tops of the large number of hills found in that region.
RESULTS:
An area is characterized which may prove to be a macro-habitat for vectors, reservoirs and etiological agents. The search for changes in the landscape and the evaluation of meteorological data has not yielded any possible additional risk factor.
CONCLUSIONS:
There is full correlation among the areas considered to present risk of infection and the presence of creeks and relevant vegetation (shrubs and trees). |
10030071 | Hepatitis B has proved to be a major health hazard in hemodialysis patients. In order to investigate the hepatitis B virus (HBV) infection profile in the hemodialysis population of Goiânia city--Central Brazil, all dialysis patients (N = 282) were studied. The prevalence of any HBV marker (HBsAg, anti-HBs, and anti-HBc) was 56.7% (95% CI: 51.1-62.7), ranging from 33.3% to 77.7% depending on dialysis unit. HBV-DNA was detected in 67.6% and 88.2% of the HBsAg-positive serum samples, in 91.3% and 100% of the HBsAg/HBeAg-positive samples, and in 18.2% and 63.6% of the HBsAg/anti-HBe-reactive sera by hybridization and PCR, respectively. The length of time on hemodialysis was significantly associated with HBV seropositivity. Only 10% of the patients reported received hepatitis B vaccination. The findings of a high HBV infection prevalence in this population and the increased risk for HBV infection on long-term hemodialysis suggest the environmental transmission, emphasizing the urgent need to evaluate strategies of control and prevention followed in these units. |
10030074 | We evaluated the components of the Fuenzalida-Palacios antirabies vaccine, which is till used in most developing countries in human immunization for treatment and prophylaxis. This vaccine is prepared from newborn mouse brains at 1% concentration. Even though the vaccine is considered to have a low myelin content, it is not fully free of myelin or of other undesirable components that might trigger adverse effects after vaccination. The most severe effect is a post-vaccination neuroparalytic accident associated with Guillain-Barré syndrome. In the present study we demonstrate how the vaccines produced and distributed by different laboratories show different component patterns with different degrees of impurity and with varying protein concentrations, indicating that production processes can vary from one laboratory to another. These differences, which could be resolved using a better quality control process, may affect and impair immunization, with consequent risks and adverse effects after vaccination. We used crossed immunoelectrophoresis to evaluate and demonstrate the possibility of quality control in vaccine production, reducing the risk factors possibly involved in these immunizing products. |
10030098 | This article reviews the role of nutrition in the incidence of gallstones. The epidemiological situation of gallbladder disease has wide worldwide geographical variations, being Pima Indians and the Chileans the most affected populations. The main nutritional risk factor is obesity. Other risk are serum cholesterol and triglyceride levels, unbalanced and excessive caloric intake, fasting periods of more than eight hours, hypocaloric diets of less than 700 Kcal/day, specially in obese subjects and parenteral nutrition lasting more than two weeks. The main conclusion of this revision is that nutritional behaviors of the population must be improved through public health programs, to reduce the incidence of obesity and related nutritional imbalances. |
10030285 | BACKGROUND:
Invasive fungal infection has a major impact on the morbidity and mortality of liver transplant recipients. Human herpesvirus (HHV)-6 infection after transplantation is associated with an immunosuppressive state and the development of cytomegalovirus disease. Because cytomegalovirus infection is a risk factor for invasive fungal infection after transplantation, we have examined whether HHV-6 and fungal infection are associated after transplantation.
METHODS:
Pretransplantation sera from 247 consecutive liver transplant recipients were analyzed for IgG to HHV-6. Thirty-three (13%) HHV-6-seronegative recipients were identified. Six of 33 (18%) seronegative recipients experienced fungal infection as compared with 15 of 214 (7%) seropositive recipients (P=0.034).
RESULTS:
In a univariate analysis of risk factors for fungal infection, pretransplantation seronegativity to HHV-6 (P=0.034), intraoperative cryoprecipitate requirements greater than the 75th percentile (P=0.035), reoperation (P=0.005), biliary stricturing postoperatively (P=0.046), and gastrointestinal or vascular complications postoperatively (P=0.030) were identified as significant risk factors. Moreover, in pairwise multivariate analysis, pretransplantation HHV-6 seronegativity remained a significant variable even in the presence of each of the other variables.
CONCLUSIONS:
These results suggest that HHV-6 seronegativity before transplantation is a valuable clinical marker that identifies patients at risk for developing fungal infection after transplantation. |
10030401 | Since there have not been any studies that quantify the influence of genetic factors on gallbladder disease (GBD) in humans using information from families, we utilized pedigree data to explore the genetic control of variation in liability to GBD. Using an extension of a variance components approach, we performed genetic analyses of GBD using information from 32 low-income Mexican-American families with two slightly different general models incorporating several sex-specific GBD risk factors. After evaluating the relative magnitudes of the covariate effects from these two models, we identified a parsimonious model including only significant predictors of GBD. According to this model, heritability for GBD was high (h2 = 0.44+/-0.18), after accounting for the significant effects of age, leptin in both sexes, total cholesterol, and HDL cholesterol in males only. We have shown quantitatively that variation in GBD is under strong genetic control. However, there are two major limitations to our findings: (1) since GBD was defined by a self-reported clinical history rather than an ultrasound examination, the prevalence of GBD could have been underestimated; and (2) since our design did not allow for shared environmental effects, our estimate of heritability may have been inflated. |
10030573 | PURPOSE:
To assess the relationship between age-related macular degeneration and appearance of the optic disk.
METHOD:
By morphometric evaluation of wide-angle color fundus photographs, 143 patients with age-related macular degeneration were compared with 33 normal subjects and with 83 diabetic patients.
RESULTS:
Size and shape of the optic disk and size of parapapillary atrophy did not vary significantly (P > .12) between the study groups.
CONCLUSIONS:
Age-related macular degeneration is not associated with special features in the appearance of the optic disk. Parapapillary atrophy, large or small optic disk, and abnormal disk shape are neither risk factors nor protective factors of age-related macular degeneration. |
10030706 | The epidemiological progression of human salmonellosis in Norway is parallel to trends noted elsewhere in Europe. During the past two decades, the number of reported cases has increased steadily, with a special sharp rise in the early 1980s due to the emergence of Salmonella enteritidis, followed by a levelling off in recent years. However, in contrast to the situation in most other European countries, about 90% of the cases from whom a travel history is available, have acquired their infection abroad. The incidence of indigenous salmonella infections as well as the prevalence of the microorganism in the domestic food chain, are both comparatively low. In 1993-4, a national case-control study of sporadic indigenous salmonella infections was conducted to identify preventable risk factors and guide preventive efforts. Ninety-four case patients and 226 matched population controls were enrolled. The study failed to demonstrate any statistically significant association between salmonellosis and consumption of domestically produced red meat, poultry or eggs. The only factor which remained independently associated with an increased risk in conditional logistic regression analysis, was consumption of poultry purchased abroad during holiday visits to neighbouring countries. A separate analysis of Salmonella typhimurium infections incriminated food from catering establishments and foreign travel among household members, in addition to imported poultry. |
10030712 | To assess the relative importance of ulcerative and non-ulcerative sexually transmitted disease in the transmission of HIV, a seroprevalence study was conducted on 2210 patients at the sexually transmitted diseases (STD) clinic of the S. Maria e S. Gallicano Hospital in Rome, between 1989 and 1994. Among male patients, by univariate analysis, strong predictors of HIV infection were homosexuality, sexual exposure to a HIV-positive partner, hepatitis B virus infection, and positive syphilis serology. An increased risk was estimated for patients with past genital herpes (odds ratio (OR) 3.86, 95% confidence intervals (CI) 0.40-18.2), and primary syphilis (OR 5.79, 95% CI 0.59-28.6). By multivariate analysis, a positive association was found with homosexuality (OR 6.9, 95% CI 2.9-16.5), and positive syphilis serology (OR 3.5, 95% CI 1.3-9.2). An adjusted OR of 2.41 was calculated for current and/or past genital herpes. These results, although not conclusive, suggest a role of ulcerative diseases as risk factors for prevalent HIV infection, and indicate that positive syphilis serology is an unbiased criterion for identifying individuals at increased risk of HIV infection. |
10036675 | BACKGROUND:
Factor XIII is known to play an important role in wound healing. In patients with head and neck carcinomas there is an accumulation of risk factors for factor XIII deficiency such as chronic liver disease, extensive tissue lesions, and high intraoperative blood loss.
METHOD:
Serum levels of factor XIII in 22 patients who had undergone tumor surgery for head and neck carcinoma were measured preoperatively and daily up to 1 week following surgery. Factor XIII was measured with the Berichrome assay as part of our routine laboratory studies. The results were correlated with preoperative pseudocholinesterase (PChe). Factor XIII was substituted for 3 days in 8 patients with persistent wound healing problems that did not improve after two weeks of conservative treatment.
RESULTS:
We found that PChe levels are a predictor for the development of factor XIII levels during this period. In patients (n = 14) with normal PChe, factor XIII levels reached 86% of the preoperative values 1 week after operation (group 1). In patients (n = 8) with low PChe, the levels reached only 65% (group 2). The rate of wound healing problems was higher in group 2 (6/8) than in group 1 (2/14). In 6 patients treated with factor XIII, the wounds healed within 3 to 7 days. In two cases revision operation was necessary.
CONCLUSION:
We conclude that the therapy with factor XIII may be successful in patients with wound healing problems. Further studies will be necessary to find out whether prophylactic substitution of factor XIII in patients with low preoperative pseudocholinesterase levels is useful. |
10036871 | The presence of lower extremity arterial occlusive disease (arteriosus sclerosis obliterance of lower extremity) is an important risk factor for patients undergoing emergency coronary artery bypass operations. Those patients had higher mortality and morbidity rates related to the complications of intraaortic balloon pumps (IABP). If lower extremity ischemia is observed, rapid procedures such as removal of the IABP with or without thrombectomy and femorofemoral crossover interposition of a graft should be performed. |
10036997 | Recent studies have elucidated that not only genetic alterations but also epigenetic changes may play an important role in carcinogenesis. In particular, de novo methylation of CpG islands within the promoter region associated with the inactivation of tumor suppressor genes (TSGs) has been demonstrated in various malignancies. Since de novo acute myelogenous leukemia shows frequent inactivation of the p15INK4B gene through the promoter methylation only, we investigated the methylation status of the p15INK4B gene in myelodysplastic syndrome (MDS). In MDS, the p15INK4B gene is also frequently hypermethylated at the promoter region located at the 5'-CpG island of exon 1. Association of frequent and strong methylation with high-risk MDS suggested that promoter methylation of the p15INK4B gene plays an important role as a late event during MDS progression. Since several TSGs and growth regulatory genes, including the p15INK4B gene, may be inactivated through promoter hypermethylation in hematological malignancies, modulation of the methylation status may be considered as a novel treatment modality in MDS. |
10037129 | BACKGROUND:
Graft ABO incompatibility has not been thought to affect patient survival after allogeneic bone marrow transplantation, although it may be associated with prolonged erythroid aplasia and immediate or delayed hemolysis.
STUDY DESIGN AND METHODS:
A retrospective analysis of a cohort of 292 allogeneic transplant recipients measured survival in a subgroup of ABO-incompatible bone marrow graft recipients.
RESULTS:
Patients with acute myelogenous leukemia or myelodysplastic syndrome receiving non-T-cell-depleted bone marrow grafts had an 85-percent greater risk of death within 100 days of transplant (relative risk, 1.85, 95% CI, 1.33-2.58; p = 0.003) than comparable patients receiving ABO-compatible grafts. Both ABO major- and minor-mismatched graft recipients were at risk. The increased mortality rate was not due to an increase in graft failure or acute graft-versus-host disease; rather, patients died of multiple-organ failure and sepsis, which is consistent with regimen-related toxicity. This effect was not seen in a larger group of 112 chronic myelogenous leukemia patients undergoing similar treatment.
CONCLUSION:
ABO incompatibility may be a significant prognostic risk factor after allogeneic bone marrow transplantation in susceptible subgroups of recipients. Care is necessary to design hematopoietic stem and progenitor cell-processing and -transfusion policies to minimize this risk. |
10037208 | BACKGROUND AND OBJECTIVE:
To evaluate potential triggering factors contributing to corneal graft rejection.
PATIENTS AND METHODS:
A prospective, case control study was conducted over a five month period. All patients presenting with new onset corneal graft rejection were enrolled into the study group. Two patients with clear grafts who presented shortly after each enrolled study group patient served as controls. Groups were matched for age, preoperative diagnosis, and number of previous keratoplasties. Participating patients and examining ophthalmologists filled out questionnaires regarding infectious, environmental and immunologic exposures.
RESULTS:
66 patients were enrolled into the study, of which 22 had new rejection episodes. The most prevalent diagnoses were keratoconus (36.6%) and herpes simplex keratitis (22.7%). Anterior chamber reaction (77.3%) and keratic precipitates (68.2%) were the most common signs of graft rejection. A history of prior rejection episodes was significantly more frequent in the study group population (p < 0.001). Factors such as sun exposure, stress, smoking and travel were more prevalent in the rejection group but not statistically significant. The history of recent vaccinations and allergic reactions were equally prevalent in both groups.
CONCLUSIONS:
The new onset of corneal graft rejection was highly associated with a prior history of graft rejection episodes (p < 0.001). Other analyzed factors were not significant triggering factors for rejection in this small series. |
10037262 | Sixty patients with poor-prognosis malignant lymphoma associated with acquired immunodeficiency syndrome (AIDS) were treated with a standard chemotherapy regimen: cyclophosphamide 600 mg/m2 i.v., day 1; vincristine 1.4 mg/m2 i.v., day 1; epirubicin 70 mg/m2 i.v., day 1; and bleomycin 10 mg/m2 i.v., on day 14. Granulocyte colony-stimulating factor, 5 microg/kg/day, was administered subcutaneously on days 4-14 to ameliorate severe myelosuppression. All patients were in an advanced stage of AIDS with <200 absolute CD4+ cells/mm3 and the presence of adverse prognostic factors related to lymphoma, such as high or high-intermediate clinical risk, multiple extranodal involvement, presence of bulky disease, and high levels of beta 2 microglobulin. Complete response (CR) was achieved by 33 patients (54%); no partial response was observed, and 27 cases were considered failures. All 27 died secondary to tumor progression without any response to salvage chemotherapy. Twenty patients in CR died of opportunistic infections related to AIDS. Actuarial 5-year survival shows that time to treatment failure for the 13 patients who remain in CR is 3.1 years. However, disease-free survival was 14.5 months. Overall survival for the entire group was 13.6 months. Side effects secondary to chemotherapy were frequent and severe, but no death related to treatment was observed. Infection-related granulocytopenia was observed in 27 cycles (8%). This study indicates that standard chemotherapy could be useful in patients with AIDS-associated lymphoma because CR rate, duration of remission, and survival were similar to those with other intensive, but more toxic, regimens. Until a new and better therapy for AIDS is found, treatment of patients with AIDS-related lymphoma will be regarded as palliative, and less toxic regimens will be considered. The use of a standard regimen appears to be an adequate therapeutic approach in this group of patients. |
10037628 | OBJECTIVE:
To evaluate the association between subfertility in men and the subsequent risk of testicular cancer.
DESIGN:
Population based case-control study.
SETTING:
The Danish population.
PARTICIPANTS:
Cases were identified in the Danish Cancer Registry; controls were randomly selected from the Danish population with the computerised Danish Central Population Register. Men were interviewed by telephone; 514 men with cancer and 720 controls participated.
OUTCOME MEASURE:
Occurrence of testicular cancer.
RESULTS:
A reduced risk of testicular cancer was associated with paternity (relative risk 0.63; 95% confidence interval 0.47 to 0.85). In men who before the diagnosis of testicular cancer had a lower number of children than expected on the basis of their age, the relative risk was 1.98 (1.43 to 2.75). There was no corresponding protective effect associated with a higher number of children than expected. The associations were similar for seminoma and non-seminoma and were not influenced by adjustment for potential confounding factors.
CONCLUSION:
These data are consistent with the hypothesis that male subfertility and testicular cancer share important aetiological factors. |
10047638 | BACKGROUND:
Mortality rate for heart transplantation for patients with hypoplastic left heart syndrome (HLHS) has improved, but there is a considerable wait until a suitable donor is available. Thus it is important to examine the duration of survival and risk factors for early death in patients with HLHS who did not undergo surgical intervention.
METHODS AND RESULTS:
Twenty-six consecutive patients were studied retrospectively. Duration of survival and the 14 following variables were investigated: date of birth, body weight at birth, cardiothoracic ratio, ascending aorta diameter, interatrial communication size, coarctation of the aorta, tricuspid regurgitation, anatomic subtype (patency) of mitral and aortic valve, arterial blood gas findings (pH, PaO 2, SaO 2, PaCO2, base excess), and ST depression in the electrocardiogram. Twenty patients survived <60 days (group A) and 6 patients survived beyond 60 days (group B). The duration of survival (mean [SD]) was 60 (151) days overall (1 patient is currently alive at 783 days). The long-term survivors (beyond 60 days) increased significantly after 1991 (P <.05). Coarctation of the aorta was a significant risk of early death (<60 days) (P <.05). Interatrial communication size was significantly smaller in group B than in group A (P <.05). The mean pH and base excess were significantly lower in group A than in group B. The other 9 variables showed no significant difference between the 2 groups.
CONCLUSIONS:
There was a significant correlation of long-term survival with stabilized ductal blood flow without coarctation of the aorta, adequate restriction of interatrial communication without severe hypoxemia, and no metabolic acidosis. |
10048119 | To define possibly affected members of 69 families and to identify the factors influencing the progression of autosomal dominant polycystic kidney disease (ADPKD), 276 subjects at risk of having inherited the mutant gene underwent ultrasonographic scanning (US), using an ultrasound real-time scanner. At a mean age of 26 +/- 12 years (range 4-71), 85/276 individuals (31%) presented ultrasound evidence of the disease (at least two cysts in one kidney and one cyst in the other) (US: positive), while only 19/85 (22%) had one or more manifestations of ADPKD prior to diagnosis. The prevalence of the disease in subjects at risk aged < 30 years was 53/154 (34%), while hepatic cysts were also detected in 7/85 ADPKD probands (8%) (five females) at a mean age of 40 +/- 6 years (range 30-45) and their frequency correlated with the number of pregnancies. History was proved to be important in suspecting the disease since symptoms were more common in US positive as compared to negative subjects (22% vs 6%, p < 0.001). On the other hand, physical examination and routine laboratory data at presentation revealed abnormal signs mainly in US positive individuals aged 30-39 years. Forty ADPKD families met the criterion for genetic study (at least two members affected) but in three of them (7.5%), no linkage to DNA-markers for the short arm of chromosome 16 was detected ("unlinked" or ADPKD2). DNA-analysis in the rest 37 "linked" (ADPKD1) families identified the gene-carrier state in 18/123 (15%) US negative subjects at risk, at a mean age of 13 +/- 7 years (range 3-25). There were significantly more US positive subjects aged > or = 30 years in ADPKD2 as compared to ADPKD1 families (83% vs 35%, p < 0.05) suggesting that the progression of the disease is slower in the former families. During a 5-year follow-up, 6/18 gene-carriers (33%) had already developed distinct renal cysts on US, at a mean age of 20 +/- 9 years (range 8-29). On the contrary, none of the ADPKD1 non-carriers and the US negative ADPKD2 subjects had shown any ultrasound findings of cystic renal disease at that period. |
10048252 | OBJECTIVE:
To characterise the implications of an outbreak of human parvovirus in a small community.
METHOD:
A community survey was conducted over a period of 18 months in a small rural town in Western Australia with a population of approximately 4300 people. Outbreak cases were assessed by the single general practice in the town. Notification of the survey was placed in both the schools and by advertisement in the local paper. Survey questionnaires distributed to community members were returned on a voluntary basis. After 12 months repeat surveys were sent to all adults who had responded to the initial survey.
RESULTS:
Eighty-eight definite and 14 equivocal cases were identified as part of the outbreak, which occurred between late July 1994 and February 1995. Serological testing which confirmed human parvovirus B19 infection was available for 29% of cases. The highest attack rate was in the 5-9 year age group. One-third of cases were adults and 9% of them developed symptoms lasting longer than 6 months. Transient anaemia almost certainly due to parvovirus infection was identified in one adult women during the course of the outbreak. No pregnant woman suffered any adverse fetal outcome as a result of human parvovirus infection.
CONCLUSION:
In an outbreak of parvovirus, children will be most commonly affected although adults can develop polyarthralgia/arthritis which may persist for several months and some may suffer transient anaemia. Pregnant women are potentially at risk of the development of fetal hydrops and fetal death, but advice to them can be based on the estimate of a less than 1% risk of adverse fetal outcome due to parvovirus infection. |
10048656 | Occupational diseases of dentists and dental nurses were compiled from the Finnish Register of Occupational Diseases. The cases were recorded during 3 3-year observation periods, namely 1982-1984, 1986-1988, and 1992-1994 (i.e., 9 observation years). The relative risk of developing occupational allergic contact dermatitis in different occupations was calculated from the statistics of the years 1986-1991, and was expressed as the age-standardized rate ratio (SRR). During the 9 observation years, the majority of registered occupational diseases of dentists and dental nurses were skin diseases (221/312; 70.8%), followed by occupational repetitive strain injuries (61/312; 19.6%) and occupational respiratory diseases (20/312; 6.4%). The incidence rate (IR) for allergic contact dermatoses/10,000 workers (contact urticaria included) increased from 26 (95% confidence interval (CI) 16-40) in 1982-1984 to 79 (95%, CI 64-97) in 1992-1994. The IR/10,000 of allergic contact dermatoses increased especially for dentists, from 5.4 (95% CI 0.7-19) in 1982 to 67 (95% CI 45-95) in 1992-1994. The increase of the IR/10,000 dental nurses was smaller: from 43 (95%, CI 26-66) in 1982-1984 to 87 (95% CI 67-111) in 1992-1994. There was no increase in the IR/10,000 cases of irritant dermatoses. The most common causes of allergic contact dermatitis were plastics, disinfectants and antimicrobials, rubber chemicals, and mercury/mercury salts. The most common causes of irritant contact dermatitis were detergents, wet and dirty work, plastic chemicals and antimicrobials. Currently, Finnish dentists have the highest risk and dental nurses have the 4th highest risk of any occupation for developing occupational allergic contact dermatitis: the risk was 6.4-fold (SRR 6.4) in dentists and 6.1-fold in dental nurses, as compared to the general working population. It is evident that safer acrylics and protective gloves, better product declarations and material safety data sheets, as well as more information about protective measures, including non-touch working techniques, are needed. |
10048680 | BACKGROUND:
In June, 1997, 21 children from a single community in Germany were hospitalized with aseptic meningitis. An epidemiologic investigation was conducted to determine the extent of the outbreak and risk factors for illness.
METHOD:
The extent of the outbreak was assessed with a cross-sectional survey of every 10th child listed in the town register among the 2240 town children < 16 years old. A case-control study determined risk factors for illness. Sixty-two cases were identified through the cross-sectional survey from hospitalized persons and from persons seen by local physicians. Controls were 114 asymptomatic persons identified from the cross-sectional survey.
RESULTS:
The overall attack rate was 16%, with the highest attack rates (24%) among the 6- to 8-year olds. Onsets occurred during a 37-day period. Among the 2240 town children <16 years of age, an estimated 353 met the case definition for enteroviral illness, 168 visited a doctor and 21 were hospitalized. Data from the case-control study indicated that contact with an ill household member [odds ratio (OR) = 6.3; 95% confidence interval (CI) 2.6 to 15.5], day-care attendance (OR = 2.6; 95% CI 1.1 to 6.2) and playground use, either two to three times per week (OR = 3.7; 95% CI 1.3 to 10.2) or daily (OR = 4.3; 95% CI 1.6 to 11.3), were risk factors for illness.
CONCLUSION:
Echovirus 30 caused substantial morbidity during this community outbreak caused by person-to-person spread. Household contacts, day-care centers and playgrounds were prominent risk factors for transmission. |
10048902 | From January 1991 through September 1994, we observed people who were infected with HIV to assess the impact of enteric parasite-associated diarrhea. Respondents answered comprehensive questionnaires covering clinical and epidemiologic information and provided stool specimens monthly, which were examined unstained as well as stained with trichrome, chromotrope 2R, and with Kinyoun carbol-fuchsin, and with indirect immunofluorescence for Cryptosporidium. In all, 602 participants, who were interviewed, provided stool specimens at 3254 monthly visits. Parasites were associated with 50 of 354 (14.1%) acute diarrheal episodes (lasting < or = 28 days) and with 97 of 279 (34.8%) chronic episodes (lasting > 28 days). A parasite was associated with 31 of 222 (14.0%) episodes that occurred when CD4+ counts were > or = 200 cells/microl and with 150 of 566 (26.5%) episodes that occurred when CD4+ counts were < 200 cells/microl. The most commonly identified parasite was C. parvum, which was associated with 18 of 354 (5.1%) acute episodes and 36 (12.9%) of the 279 chronic episodes of diarrhea. In this patient population, enteric protozoan parasites were commonly associated with illness, particularly as immunosuppression worsened, and were more likely to be associated with chronic rather than acute diarrhea. |
10048909 | To measure the effect of trimethoprim-sulfamethoxazole (TMP-SMX) in preventing bacterial illness, Pneumocystis carinii pneumonia (PCP), and death in people with AIDS, we conducted a retrospective medical record review of 1078 persons who were observed for 3 years on average who attended nine outpatient facilities in Seattle, Washington between January 1990 and April 1996. We calculated relative risk estimates to measure the protective effect of TMP-SMX on the development of major bacterial illnesses, PCP, and death. Use of TMP-SMX decreased the risk of PCP (relative risk [RR] = 0.23; 95% confidence interval [CI], 0.14-0.36) and deaths not attributable to PCP (RR = 0.59; 95% CI, 0.47-0.73). Prevention of major bacterial illnesses of known etiology was of borderline significance (RR = 0.77; 95% CI, 0.57-1.05) and became statistically significant with the addition of patients with infections of unknown etiology (RR = 0.77; 95% CI 0.61-0.97). Use of TMP-SMX PCP prophylaxis significantly reduced the risks of death and of PCP and was associated with a trend toward reduced risk of major bacterial infections. |
10048959 | Indirect evidence, notably ecological comparisons and an association with skin cancer, links non-Hodgkin's lymphoma (NHL) with exposure to sunlight. We conducted a population-based, nationwide cohort study with exposure to outdoor work inferred from job titles reported in the population and housing censuses in 1960 and/or 1970 and by classifying each individual's work and home addresses according to latitude. Follow-up for cancer incidence was accomplished through record linkages with the virtually complete Swedish Cancer Registry. The cohort included all Swedish residents who were recorded as gainfully employed in both censuses. Altogether 4,171,175 individuals contributing 69,639,237 person-years accrued through 1989 were included in the analyses. We identified 10,381 cases of NHL, 4,018 cases of chronic lymphocytic leukemia (CLL), 11,398 cases of malignant melanoma (MM) and 11,913 cases of squamous cell skin cancer (SCC). We calculated age-adjusted relative risks for NHL, CLL, MM and SCC in strata based on estimated residential and occupational sunlight exposure. Interaction effects were considered for pesticide and solvent exposure. NHL, MM and SCC, but not CLL, were positively associated with increasingly southerly residential latitude, with stronger associations seen for skin cancer compared to NHL. Occupational sun exposure was not associated with the risk of developing any of the studied cancers. Pesticides and solvents also were not related to an increased risk of NHL, nor did these exposures enhance effects of residential or occupational sunlight exposure. Our results provide some support for an association of sunlight exposure with NHL incidence based on the associations seen using geographic latitude of residence as a proxy for exposure. Although type of occupation may be an imperfect index of the biologically relevant ultraviolet (UV) light dose, our data on individual exposure are not consistent with an important role of sunlight in the etiology of NHL. |
10048963 | Adult T-cell leukemia/lymphoma (ATL), a rare outcome of infection with human T-lymphotropic virus (HTLV-I), is endemic in central Brooklyn, which has a large Caribbean migrant population. Previous studies have suggested that HTLV-I prevalence in central Brooklyn may be similar to that recorded in the Caribbean islands. We established a pilot 1-year surveillance program to identify cases of ATL in 7 of 10 hospitals serving the residents of 18 zip codes of central Brooklyn with a combined population of 1,184,670. Of the 6,198 in-patient beds in the catchment area, approximately 83% were covered. Twelve incident cases of ATL were ascertained, all among persons of Afro-Caribbean descent, indicating an annual incidence in African-Americans in this community of approximately 3.2/100,000 person-years. Unexplained hypercalcemia was the most useful screening method, identifying 3 of 5 patients not referred for possible ATL by a local hematologist. The female:male ratio was 3:1. The age pattern was different from that reported in the Caribbean Basin and closer to the pattern seen in Japan. Our study supports evidence that HTLV-I infection and ATL are endemic in central Brooklyn and suggests that a more intensive surveillance program for this disease coupled with intervention efforts to reduce HTLV-I transmission are warranted. |
10048967 | We have investigated the association between the polymorphisms of drug-metabolizing enzymes and susceptibility to head-and-neck squamous-cell carcinoma (HNSCC). PCR-based analysis was performed on 145 Japanese patients and 164 healthy Japanese controls to determine genotypes of polymorphisms in CYP1A1, CYP2E1, GSTM1, GSTP1, and NAT2. Patients and controls were compared by multivariate analysis. The CYP1A1 Val/Val genotype was seen more frequently in patients than in controls [odds ratio (OR) 4.1, p = 0.038). The frequency of the slow plus intermediate NAT2 genotypes was also higher in patients (OR 2.0, p = 0.039). When we analyzed the distributions of the genotypes in 69 laryngeal and 45 pharyngeal cancer patients, laryngeal cancer patients had a higher frequency of NAT2 slow or intermediate genotype (OR 2.7, p = 0.011) and GSTP1 AA genotype (OR 2.4, p = 0.047) than controls. Pharyngeal cancer patients had a higher frequency of the CYP1A1 Val/Val genotype than controls (OR 5.7, p = 0.034), suggesting that different organs may be responsive to different chemicals from the environment. Furthermore, 23 patients who developed multiple cancers (HNSCC plus other) were compared with 115 patients with HNSCC alone. There was no significant difference in the polymorphisms between the 2 groups, though excessive alcohol consumption (more than 50 g/day of ethanol) appeared to be a risk factor for multiple cancers (p = 0.053). |
10049197 | BACKGROUND:
Immunosuppressive therapy has been used for successful treatment of severe aplastic anemia, but little information is available on outcome in older patients.
OBJECTIVE:
To evaluate outcome in patients older than 50 years of age who received immunosuppressive therapy for aplastic anemia.
DESIGN:
Retrospective cohort study.
SETTING:
56 centers of the European Group for Blood and Marrow Transplantation (EBMT).
PATIENTS:
810 patients with aplastic anemia reported between 1974 and 1997. Patients were evaluated according to age group: 60 years of age or older (n = 127), 50 to 59 years of age (n = 115), and 20 to 49 years of age (n = 568; reference group).
INTERVENTION:
Antilymphocyte globulin, cyclosporine, or both.
MEASUREMENTS:
Survival, cause of death, response to treatment, relapse rate, and risk for late complications were analyzed in all patients and by age group.
RESULTS:
The 5-year survival rate was 57% (95% CI, 46% to 66%) in patients 50 to 59 years of age and 50% (CI, 39% to 60%) in patients 60 years of age or older compared with 72% (CI, 68% to 76%) in patients younger than 50 years of age (P < 0.001). Response to therapy, relapse rate, and risk for clonal complications were similar in all three age groups (P > 0.2). Age was significantly associated with an increased risk for death (relative risk compared with patients 20 to 49 years of age, 1.80 [CI, 1.29 to 2.52] for patients 50 to 59 years of age and 2.57 [CI, 1.87 to 3.53] for patients > or = 60 years of age), mainly because of bleeding or infection (P = 0.02). Response to immunosuppressive therapy in all patients at 12 months was 62% (CI, 58% to 66%); no difference was seen among the age groups in multivariate analysis (P > 0.2). Sixty-six of the 379 responding patients (17%) subsequently had relapse. The risk for clonal disorders at 10 years was 20% (CI, 15% to 27%).
CONCLUSIONS:
Response to immunosuppression in aplastic anemia is independent of age, but treatment is associated with increased mortality in older patients. |
10049969 | BACKGROUND:
Silent infarcts have been reported in 17% of young patients with sickle cell disease and are associated with impaired performance on standardized psychometric tests. Risk factors for the development of these lesions have not been identified.
METHODS:
Investigators in the Cooperative Study of Sickle Cell Disease performed a brain magnetic resonance imaging scan on sickle cell anemia patients age 5.9 years and older who had been followed according to the protocols of the Cooperative Study since birth. Individuals with a known history of cerebrovascular accident were excluded from this analysis. Patients with and without silent infarctions were compared with regard to clinical and laboratory parameters.
RESULTS:
The study sample included 42 patients (18.3%) with silent infarcts. Patients who had silent infarcts were significantly more likely to have a clinical history of seizure and a lower painful event rate. Lower hemoglobin level, increased leukocyte count, elevated pocked red blood cell count, and SEN betaS globin gene haplotype were associated also with the presence of silent infarcts. There was no relationship between silent infarcts and platelet count, fetal hemoglobin level, reticulocyte percentage, serum aspartate aminotransferase level, total bilirubin concentration, blood pressure, growth parameters, or presence of alpha-thalassemia. A multivariate model for silent infarction identified the following as risk factors: low pain event rate, history of seizure, leukocyte count >/=11.8 x 10(9)/L, and the SEN betaS globin gene haplotype.
CONCLUSIONS:
Patients with risk factors for silent infarcts should be evaluated for cerebrovascular disease. If evidence of infarction is found, consideration must be given to therapeutic intervention. At present, the appropriate treatment has not been determined. |
10049984 | OBJECTIVE:
To identify risk factors for invasive pneumococcal disease, including penicillin-resistant infections, among children 2 to 59 months of age.
DESIGN:
Case-control study.
PARTICIPANTS:
Patients with invasive pneumococcal infections identified by population-based surveillance (n = 187) and controls identified through random-digit telephone dialing (n = 280).
OUTCOME MEASURES:
Invasive pneumococcal disease was defined as isolation of Streptococcus pneumoniae from a normally sterile site. Patients 2 to 59 months of age who were residents of one of four active surveillance areas were included. S pneumoniae isolates were tested by broth microdilution. Isolates with a minimum inhibitory concentration to penicillin >/=2 microg/mL were considered resistant.
RESULTS:
Invasive pneumococcal disease was strongly associated with underlying disease and with day care attendance in the previous 3 months. Among 2- to 11-month-olds, current breastfeeding was associated with a decreased likelihood of invasive pneumococcal disease (odds ratio, 0.27; 95% confidence interval: 0.08, 0.90). Penicillin-resistant infections were independently associated with day care attendance, at least one course of antibiotics, and at least one ear infection in the previous 3 months.
CONCLUSIONS:
This study shows the association of underlying illnesses, day care attendance, and lack of breastfeeding with risk of invasive pneumococcal disease in children. The association of recent antibiotic use and infection with penicillin-resistant S pneumoniae highlights the need to avoid unnecessary antibiotic use in children. |
10050706 | A genetic susceptibility to drug or chemical toxicity may provide a basis for an increased risk of idiosyncratic aplastic anaemia (AA). The cytochrome P450 enzymes are responsible for the metabolism of many drugs, some of which have been linked to AA. Mutations in the cytochrome P450 CYP2D6 gene result in absent or impaired enzyme activity in about 7% of Caucasians, whereas a specific mutation in the 5'-regulatory region of the CYP2E1 gene causes overexpression of the gene. We evaluated the frequency of allelic variants of CYP2D6 and CYP2E1 using allele-specific PCR amplification and restriction enzyme analysis of blood mononuclear cell DNA among 54 Caucasian AA patients. CYP2D6 and CYP2E1 were chosen because of the link between AA and the antipsychotic drug remoxipride (CYP2D6 substrate) and benzene (CYP2E1 substrate), respectively. Results were compared with 53 controls matched for age, sex and ethnicity. The percentage of AA patients homozygous for the CYP2D6*3, CYP2D6*4 alleles (poor metabolizer phenotype) and the CYP2E1 mutant allele (overexpression) was 0%, 4% and 0%, respectively, and the percentage of heterozygotes was 2%, 28% and 15%, respectively. For normal controls the corresponding results for homozygous mutants were 0%, 4% and 0% and for heterozygotes 4%, 25% and 6%, respectively. We concluded that there were no major differences in the frequencies of the genetic polymorphisms between this series of AA patients and controls, but due to the low number of cases with the poor metabolizer phenotype and those with a history of drug exposure, the power of the study was too low to disprove an interaction. |
10051258 | Chronic rejection after lung transplantation, manifesting as bronchiolitis obliterans syndrome (BOS), has become the dominant challenge to long-term patient and graft survival. In order to elucidate risk factors for development of BOS we utilized the 1995 revision of the working formulation for the classification of lung allograft rejection (), and devised a quantitative method to retrospectively study lung transplant biopsies from all patients who survived at least 90 d. All transbronchial biopsies were regraded 0 to 4 for acute perivascular rejection and lymphocytic bronchitis/bronchiolitis (LBB), and the grades were totaled over a period of time to give two scores, respectively, for each patient. Also examined were timing of acute rejection and LBB episodes and decreased immunosuppression defined as two or more cyclosporine A levels < 200 ng/ml. Sixty-six patients with BOS and 68 with no BOS (NBOS) satisfied our criteria for inclusion in the study. Demographics including age, sex, and primary diagnoses were similar. The mean perivascular score for BOS was 6.2 over a mean follow-up of 822 d (range, 113 to 2,146) compared with 3.2 for NBOS over 550 d (range, 97 to 1,734) mean follow-up. Airway scores were 5.3 and 1.7, respectively, for the same follow-up periods. There was no correlation between length of follow-up and rejection or LBB scores, although mean length of follow-up for the two groups was significantly different. Late acute rejection and LBB were significantly associated with BOS as was decreased immunosuppression. In addition to perivascular rejection, LBB, late acute rejection, and decreased immunosuppression are significant risk factors for the development of BOS. Analysis of the current data leads us to believe that LBB, in the absence of infection, is in fact a manifestation of acute rejection, with similar implications for graft function as acute perivascular rejection. |
10051493 | For reasons not yet determined, chronic liver disease (CLD) has been a leading cause of excess morbidity and mortality in central Harlem. We conducted a case series and case-control analysis of demographic, clinical, epidemiological, and alcohol-intake-related information from patients with CLD and age- and sex-matched hospitalized control patients. Patients' sera were tested for markers of viral hepatitis. The presumed etiology of CLD among case-patients was as follows: both alcohol abuse and hepatitis C virus (HCV) infection, 24 persons (46% of case-patients); alcohol abuse alone, 15 (29%); HCV infection alone, 6 (12%); both alcohol abuse and chronic hepatitis B virus (HBV) infection, 3 (6%); and 1 each (2%) from: 1) schistosomiasis, 2) sarcoidosis, 3) unknown causes, and 4) alcohol abuse, chronic HBV, and HCV combined. In the case-control analysis, patients who had both alcoholism and either HBV (odds ratio [OR]: 6.3; 95% CI: 0. 5-334) or HCV (OR: 2.9; 95% CI: 1.3-6.2) were at increased risk for CLD, whereas patients who had only one of these three factors were not at increased risk for CLD. Patients who tested positive for the hepatitis G virus (HGV) did not have a significantly increased risk of CLD, and neither severity of CLD nor mortality was greater among these patients. Most patients in central Harlem who had CLD had liver damage from a combination of alcohol abuse and chronic viral hepatitis. Alcohol and hepatitis viruses appear to be synergistically hepatotoxic; this synergy appears to explain both the high rate of CLD in central Harlem and the recent reductions in this rate. Persons at risk for chronic HBV and HCV infection should be counseled about their increased risk of CLD if they consume excessive alcohol. Morbidity and mortality from liver disease could be decreased further by a reduction in alcohol consumption among persons who have chronic HBV and HCV infection, avoidance of needle sharing, and hepatitis B vaccination. |
10063546 | Toxic megacolon is defined as a fulminant attack of colitis with total or segmental dilatation of the colon. Toxic megacolon is mostly a complication of nonspecific ulcerative colitis or Crohn's colitis but it may also occur in pseudomembranous colitis and other forms of infectious colitis. Toxic dilatation of the colon is a sign of transmural acute inflammation in which perforation of the colon is impending or may already have occurred. Free perforation means a fourfold increase in the mortality of a fulminant attack of colitis. Dilatation of the colon is not by itself an indication for immediate operation. The dilatation may increase, fluctuate or even disappear, leaving the patient still severely ill with toxic colitis requiring immediate surgery. The indication and optimal timing of surgical intervention require optimal interdisciplinary collaboration between surgeons and gastroenterologists. The procedure of choice for surgical treatment of toxic megacolon is colectomy and ileostomy. The mortality and morbidity of urgent surgery have been decreased by avoiding rectal excision. The rectal stump is either closed as a pelvic Hartmann's pouch or the sigmoid remnant is exteriorized as a mucous fistula or closed subcutaneously. Progress in intensive therapy and perioperative patient management has relegated simple decompression by diverting loop ileostomy and skin-level colostomy as advocated by Turnbull et al nearly 30 years ago to the role of an obsolete procedure which seems hardly ever preferable to resection of the diseased bowel. |
10063743 | Pancreatic cancer is a leading cause of cancer-related deaths in developed countries. Gall bladder cancer is very common in South American countries, around the Mediterranean and in Japan. A majority of patients with these cancers receive only palliative therapy in spite of recent advances in investigation and surgery. Their poor prognosis and increasing incidence in India necessitate a better epidemiologic approach towards their control. This review is based on epidemiological data, publications and abstracts from India. Population-based data reveal that the incidence of gall bladder cancer is very high in northern Indian cities (5-7 per 100,000 women) and low (0-0.7 per 100,000 women) in southern India. The distribution suggests a high-incidence region comprising Uttar Pradesh, Bihar, Orissa, West Bengal and Assam. The cancer is twice more common in women and is the leading cancer among digestive cancers in women in the northern Indian cities of Delhi and Bhopal. There are few analytical data to hypothesize why this geographical predisposition. The high incidence is also observed in north Indian immigrants to the United Kingdom. The incidence of pancreatic cancer is low (0.5-2.4 per 100,000 men and 0.2-1.8 per 100,000 women) in most parts of India. Somewhat higher rates are seen in the male urban populations of western and northern India. Studies from Kerala support an association between tropical pancreatitis and pancreatic cancer. Time trends reveal an increase in the incidence of gall bladder and pancreas cancers; the increase in the former is alarming. We estimate that the approximate annual cancer burden of India in 2001 would include 17,730 cases of gallbladder cancer and 14,230 of pancreatic cancer. Multi-center studies are needed to identify potentially preventable risk factors associated with gall bladder and pancreatic cancer in India. |
10063987 | High plasma levels of homocysteine are the results of the interplay between congenital and environmental factors. In the last two decades, a growing amount of interest has focused on mild-to-moderate hyperhomocysteinemia as a risk factor of thromboembolic diseases. Case-control and cross-sectional studies clearly indicated that mild-to-moderate hyperhomocysteinemia is associated with heightened risk of both arterial and venous thrombosis. On the other hand, prospective studies did not unequivocally show that hyperhomocysteinemia is associated with a high thrombotic risk. Therefore, additional studies are needed to define whether hyperhomocysteinemia is a risk factor for thrombosis, especially of the venous circulation. Among these, prospective cohort studies will clarify better the temporal relationship between high homocysteine levels and the thrombotic event. Most importantly, however, randomized, placebo-controlled, double-blind trials of the effects of homocysteine-lowering vitamins on the thrombotic risk are urgently needed. Not only will they help in defining whether the relationship between hyperhomocysteinemia and thrombosis is causal, they will also have a potential dramatic impact in the prevention of thromboembolic events. |
10063989 | Homozygous or compound heterozygous protein S (PS) deficiency is a very rare disorder in the anticoagulant system, that can lead to life-threatening thrombotic complications shortly after birth. This report describes the results of the genetic analysis of the PROS 1 genes in a Thai girl patient. She was reported in 1990 as the first case with homozygous PS deficiency and neonatal purpura fulminans. In the present report, we identified the mutations in this patient by direct sequencing of PCR products representing all 15 exons of the PROS 1 gene and their flanking intronic regions. The patient turned out to be compound heterozygous for two null mutations. One allele contained a novel sequence variation, an A-insertion in an A5-tract covering codon 146 and 147, that results in a frameshift and a stop codon (TAA) at position 155. The other allele contained a nonsense mutation in exon 12 by a transition at codon 410 CGA (Arg) to TGA (stop). Cosegregation of PS deficiency with these two genetic defects was observed in her family. |
10063991 | The risk of spontaneous or risk-period related venous thromboembolism in family members of symptomatic carriers of antithrombin (AT), protein C (PC) or protein S (PS) defects, as well as of the Factor V Leiden mutation is still undefined. We performed a retrospective cohort study in family members (n = 793) of unselected patients with a documented venous thromboembolism and one of these deficiencies to make an estimate of this risk. The annual incidences of total and spontaneous venous thromboembolic events in carriers of AT, PC or PS defects (n = 181) were 1.01% and 0.40%, respectively, as compared to 0.10% and 0.04% in non-carriers, respectively (relative risks both 10.6). In carriers of Factor V Leiden (n = 224), the annual incidences of total and spontaneous venous thromboembolism were 0.28% and 0.11%, respectively, as compared to 0.09% and 0.04% in non-carriers, respectively (relative risks 2.8 and 2.5). Additional risk factors (immobilisation, surgery and trauma: oral contraceptive use; and pregnancy/ post-partum) increased the risk of thrombosis in carriers of AT, PC and PS defects as compared to non-carriers (relative risks 8.3, 6.4 and 8.2, respectively). Oral contraceptive use and pregnancy/ post-partum period increased the risk of thrombosis in carriers of Factor V Leiden to 3.3-fold and 4.2-fold, respectively, whereas other risk factors had only a minor effect. These data lend some support to the practice of screening family members of symptomatic carriers of a AT, PC and PS deficiency. For family members of symptomatic carriers of Factor V Leiden, screening does not seem to be justified except for women in fertile age. |
10063993 | BACKGROUND:
G to A transitions at nucleotide position 20210 of the factor II (Fll) gene and at 1691 of the factor V (FV) gene have been shown to be associated with an increased risk of venous thrombosis. Since it is still unclear whether both gene variations are also related to an increased risk of coronary heart disease (CHD), we studied the relation of both gene variations to coronary artery disease (CAD) and myocardial infarction (MI) in a sample of 2210 male individuals whose coronary anatomy were defined by coronary angiography.
RESULTS:
In the total sample, the FII G20210A gene variation was not associated with the presence or the extent of CAD, the latter defined either by the degree of vessel disease or by a CHD score according to Gensini. However, individuals with unfavourable lipid profiles showed pronounced differences in CHD scores between GA heterozygotes and GG homozygotes: this observation applied in particular to younger patients (<62 years; mean age of total sample) who simultaneously had low apoAI/apoB ratios (< 1.19, mean value) and high Lp(a) plasma levels (>28 mg/dl; mean value). In addition, in subjects without acetylsalicylic acid treatment GA heterozygotes had clearly higher CHD scores than AA genotypes. Further restriction to smokers, to subjects with high fibrinogen plasma levels (>3.47 g/l; mean value) or to patients with high glucose concentrations (>112 mg/dl; mean value) tended to increase the difference in CHD score between FII G20210A genotypes. An association of the FII G20210A gene variation with non-fatal MI was not observed. In the total sample and in high and low risk subpopulations, an association of the FV G1691A gene variation was not detected neither with presence and extent of CAD or with nonfatal MI.
CONCLUSION:
The importance of the factor II G20210A gene variation for CHD may be restricted to individuals with major cardiovascular risk factors. In addition, the present study did not strengthen the hypothesis of the factor V G 1691 A transition as a risk factor of coronary heart disease neither in the total sample nor in subgroups of individuals who were at high or low risk of CHD. |
10064238 | Solid organ transplant recipients are at risk for Pneumocystis carinii pneumonia (PCP), but the risk of PCP beyond 1 year is poorly defined. We identified 25 cases of PCP in 1,299 patients undergoing solid organ transplantation between 1987 and 1996 at The Cleveland Clinic Foundation (4.8 cases per 1,000 person transplant-years [PTY]). Ten (36%) of 28 PCP cases (transplantation was performed before 1987 in three cases) occurred > or = 1 year after transplantation, and no patient developed PCP while receiving prophylaxis for PCP. The incidence of PCP during the first year following transplantation was eight times higher than that during subsequent years. The highest rate occurred among lung transplant recipients (22 cases per 1,000 PTY), for whom the incidence did not decline beyond the first year of transplantation. We conclude that the incidence of PCP is highest during the first year after transplantation and differs by type of solid organ transplant. Extending the duration of PCP prophylaxis beyond 1 year may be warranted for lung transplant recipients. |
10064660 | OBJECTIVE:
A retrospective analysis of 74 cases of neonatal-onset ornithine transcarbamylase (OTC) deficiency.
METHODS:
The medical records of 74 of the 128 male patients referred to this center with neonatal onset OTC from 1976 to 1996 were available and analyzed.
RESULTS:
Initial symptoms of OTC deficiency were nonspecific and included feeding difficulties, lethargy, and "respiratory distress"; vomiting was infrequent. Respiratory alkalosis was regularly observed; the mean pH and pCO2 were 7.5 and 24 torr, respectively. Early consideration of a metabolic disorder in those neonates with a negative family history was only 9%. Sepsis was initially misdiagnosed in 50% of the cases. For all patients the mean age at onset was 63 hours. Survival was better among those who had later onset, later diagnostic studies, and diagnosis. Apart from 1 patient whose peak ammonium level was 400 micromol/L, all surviving patients had severe developmental delay.
CONCLUSIONS:
OTC deficiency should be suspected in term infants who have early signs of encephalopathy, particularly after the first 24 hours; a respiratory alkalosis is pathognomic of urea cycle disorders. Severe developmental delay is the usual outcome of OTC deficiency. |
10064760 | Gallbladder cancer (GC) has been reported in 0.3-1.5% of cholecystectomies. Since the introduction of laparoscopic surgery, cholecystectomies have increased and occult GC may therefore be more frequent. Herein we analyze our own experience to determine whether there was an increase in GC. We also evaluate the risk factors for this outcome. Four patients with GC undiagnosed before surgery (four of 602 cases, or 0.66%) were submitted to laparoscopic cholecystectomy. The percentage in patients who underwent open surgery was 0.28% (two of 714 cases). Without reoperation, three patients died in the laparoscopic group and one is alive at 12 months. Trocar site metastasis was not observed. Although the percentage of GC (0.28% versus 0.66%) increased, the percentage is still in the referred average. Undiagnosed GC is on the increase. Examination of the gallbladder and a frozen section, if necessary, are recommended. Calcified gallbladders, age >70 years, a long history of stones, and a thickened gallbladder all represent significant risk factors. |
10064919 | Agricultural activity occurs within many medium size towns in developing countries. Rural influences and urbanization, which may be well or poorly managed, combine to create new health problems. A geographical approach is useful for evaluating the ability of the health care system to deal efficiently with these problems. Such an approach should take into account the urban environment and human population, health care and spatial differentiation factors. Relevant health indicators were selected to analyze the geographical patterns of health risk and of the health care system. These factors were analyzed according to area, at various levels. Field studies were carried out and aerial photographs and the various available maps were also studied. Results were compared to determine whether the health care system was appropriate for the health needs of the town. Urinary schistosomiasis is a useful example for assessing the value of the suggested methodology. The risk of transmission of this disease is high so its early detection is vital. The ability of the health care system to detect infection was assessed. |
10064948 | In a cross-sectional study the employees of a Sewage Company were tested for hepatitis B virus (HBV) markers--HBsAg, anti-HBs, anti-HBc--to determine the prevalence of HBV infection and assess the risk of exposed sewage workers becoming infected, so as to evaluate the necessity for appropriate vaccination. The overall prevalence of HBV markers was 43.9% and 6.6% of the employees were HBsAg carriers. In the univariate analysis the prevalence of past and current infection was significantly associated with exposure to sewage (p < 0.001), age (p < 0.001) and with educational level (p < 0.001). However, the logistic regression analysis confirmed that only exposure to sewage was independently associated with positivity for HBV infection (p < 0.001). Workers exposed to sewage should therefore be considered for vaccination against hepatitis B virus. |
10064969 | To determine the risk factors for sudden deaths in hospitalized patients, 209 patients (103 men and 106 women, age 76.7 +/- 12.6 years old, mean +/- S.D.) who died in 1996 were divided into two groups and their records were analyzed. One group, the sudden death group (SD), consisted of 16 patients who had stayed in the hospital for 2 weeks or more before the onset of symptoms that led to death within 24 hours. Those who died more than 24 hours after symptoms began were placed into the non-sudden death group (NSD). Fourteen patients who died within 2 weeks of admission were not analyzed in this study. Comparing the data of the two groups led to the following findings. First, the major causes of death in the SD group were exacerbation of chronic cardiac failure (5 cases), acute cardiac failure (2 cases), exacerbation of chronic respiratory failure (2 cases) and acute respiratory failure (2 cases). Second, patients in the SD group were significantly older than those in the NSD group, and had significantly more prescriptions for digitalis. Third, patients in the SD group had higher levels of hemoglobin and hematocrit, lower levels of BUN and a higher cardiothoracic ratio. Fourth, patients in the SD group had a higher incidence of ST abnormalities and T wave abnormalities in their electrocardiograms. Brugada syndrome or long QT syndrome were not seen in either group. Taken together, these findings suggest that aged patients with cardiac failure and myocardial ischemia may be at higher risk of sudden death. |
10066055 | 92 patients treated for tick-borne encephalitis (TBE) in the Department for Infectious Diseases, University Hospital Osijek, over a 22-year period (1973-1995) were analysed. The patients were mostly forestry workers. The appearance of the disease followed the biological activity of the tick, with the largest number of affected individuals recorded between April and August. TBE in eastern Croatia is a relatively frequent infectious disease, appearing almost every year. In a smaller number (9.8%) of cases the clinical picture was aseptic meningitis, while in the majority of patients (90.2%) it presented as an acute meningoencephalomyelitic form. The course was relatively severe in the majority of the patients analysed, with disturbances of consciousness (32.6%) and transitory neurological signs (61.9%). Three patients died (3.3%) in the early phase of the disease. A monophasic course dominated. The clinical and epidemiological data were compared with the cases described in other parts of Croatia and regional differences were seen in the severity of illness. These variations could be due to the previously hypothesized different virus subtypes, or to some other unknown factors. |
10066149 | Acute immune thrombocytopenia (ITP) in children is a benign disease, presenting mostly with skin purpura and minor bleeds. It has a high rate of spontaneous remission. Intracranial hemorrhage (ICH) is extremely rare; the risk is higher during the chronic phase and in children with additional risk factors. The threshold platelet count in ITP is not known because of problems with platelet counting in thrombocytopenia and the lack of clinical data. The threshold is probably lower than in leukemia, because primary hemostasis is better in ITP. So far, there is no proof for the clinical efficacy of treatment or prophylaxis with intravenous immunoglobulin (IVIg) and glucocorticoids (GC), medications that have several adverse effects. The question remains open whether or not we are treating the platelet count in children with acute ITP. |
10066860 | BACKGROUND AND PURPOSE:
This study was conducted to analyze the association between reported risk factors for Alzheimer's disease, apolipoprotein E epsilon4 allele, and cardiovascular disease and neuropathological changes essential for the diagnosis of Alzheimer's disease.
METHODS:
Our data are based on clinical and postmortem evaluations of a cohort of nondemented (n=118) and demented (n=107) individuals. A cardiovascular index was calculated at autopsy to estimate the extent of cardiovascular disease. Neuropathological lesions such as senile/neuritic plaques, neurofibrillary tangles, beta-amyloid load, cerebral amyloid angiopathy, and the load of paired helical filaments were determined.
RESULTS:
The aforementioned neuropathological lesions did not show any positive significant correlation with cardiovascular index. In contrast, the extent of Alzheimer's lesions was significantly higher in those nondemented and demented patients carrying the apolipoprotein E epsilon4 allele than in those without this allele.
CONCLUSIONS:
Our results demonstrate that the apolipoprotein E epsilon4 allele, but not cardiovascular disease, indeed influences the extent of Alzheimer's lesions seen in the brain tissue of demented patients as well as asymptomatic controls. |
10066947 | CONTEXT:
The "Standards, Options and Recommendations" (SOR) project, started in 1993, is a collaboration between the Federation of the French Cancer Centres (FNCLCC), the 20 French Cancer Centres and specialists from French Public Universities, General Hospitals and Private Clinics. For pediatric issues, this project is a collaboration between the FNCLCC and the French Society of Pediatric Oncology (SFOP). The main objective is the development of clinical practice guidelines to improve the quality of health care and outcome for cancer patients. The methodology is based on literature review and critical appraisal by a multidisciplinary group of experts, with feedback from specialists in cancer care delivery.
OBJECTIVES:
To develop clinical practice guidelines according to the definitions of Standards, Options and Recommendations for the clinical care of osteosarcoma in children and adult.
METHODS:
Data have been identified by literature search using Medline (1985-december 1998) and the expert groups personal reference lists. The main criteria considered were incidence, risk factors, prognostic factors and efficacy of treatment. Once the guidelines were defined, the document was submitted for review to 27 national and international independent reviewers, and to the medical committees of the 20 French Cancer Centres and, in particular, the 4 which have particular expertise in pediatric cancer management.
RESULTS:
The main recommendations for osteosarcoma management are that: 1) the clinical diagnosis is based on appropriate clinical and radiological findings; 2) the final diagnosis is pathological and the biopsy should be performed by the surgeon who will subsequently perform the definitive surgery; 3) surgical biopsy must be of adequate size and performed by an experienced surgeon; 4) the therapeutic strategy for osteosarcoma is based on surgery with neoadjuvant and adjuvant chemotherapy given in experienced centres. Inclusion of high dose methotrexate is recommended for children, and the dose of methotrexate must be adapted for adults. Inclusion of children in SFOP protocols and adults in EORTC and FNCLCC clinical trials is recommended; 5) treatment of metastatic osteosarcoma is based on chemotherapy and surgery to lung metastases which may be curative. Amputation is rarely appropriate. Inclusion of children in SFOP and of adult in EORTC and FNCLCC clinical trials for metastatic osteosarcoma is recommended; 6) at the present time, there are no clear data on which to base guidelines for timing and duration of follow-up studies in this condition. |
10067212 | Chest physiotherapy (CP) in the mechanically ventilated newborn infant belongs to standard treatment methods of neonatal intensive care units in many countries for more than twenty years. In the late seventies, some of the studies published were able to demonstrate a beneficial effect of CP on short time improvement of oxygenation in those newborns treated. Other trials dealt with the (patho)-physiologic changes e.g. in cerebral perfusion following routine nursery procedures such as positioning, suctioning and CP. Recent studies have shown that the mechanically ventilated preterm infant is at risk to suffer intracranial bleeding or a "postnatal encephaloclastic porencephaly" due to routine CP. Prospective randomized trials with large patient numbers are needed to prove an effect of CP on shortening mechanical ventilation in the newborn. Meanwhile CP should not be administered on a routine basis especially not in the preterm infant, but only after assessment of the individual risk-benefit-ratio. |
10067265 | The human plasma lipoprotein Lp(a) has gained considerable clinical interest as a genetically determined risk factor for atherosclerotic vascular diseases. Numerous (including prospective) studies have described a correlation between elevated Lp(a) plasma levels and coronary heart disease, stroke and peripheral atherosclerosis. Lp(a) consists of a large LDL-like particle to which the specific glycoprotein apo(a) is covalently linked. The apo(a) gene is located on chromosome 6 and belongs to a gene family including the highly homologous plasminogen. Lp(a) plasma concentrations are controlled to a large extent by the extremely polymorphic apo(a) gene. More than 30 alleles at this locus determine a size polymorphism. The size of the apo(a) isoform is inversely correlated with Lp(a) plasma concentrations, which are non-normally distributed in most populations. To a minor extent, apo(a) gene-independent effects also influence Lp(a) concentrations. These include diet, hormonal status and diseases like renal disease and familial hypercholesterolemia. The standardisation of Lp(a) quantification is still an unresolved problem due to the enormous particle heterogeneity of Lp(a) and homologies of other members of the gene family. Stability problems of Lp(a) as well as statistical pitfalls in studies with small group sizes have created conflicting results. The apo(a)/Lp(a) secretion from hepatocytes is regulated at various levels including postranslationally by apo(a) isoform-dependent prolonged retention in the endoplasmic reticulum. This mechanism can partly explain the inverse correlation between apo(a) size and plasma concentrations. According to numerous investigations, Lp(a) is assembled extracellularly from separately secreted apo(a) and LDL. The sites and mechanisms of Lp(a) removal from plasma are only poorly understood. The human kidney seems to represent a major catabolic organ for Lp(a) uptake. The underlying mechanism is rather unclear; several candidate receptors from the LDL-receptor gene family do not or poorly bind Lp(a) in vitro. Lp(a) plasma levels are elevated over controls in patients with renal diseases like nephrotic syndrome and end-stage renal disease. Following renal transplantation, Lp(a) concentrations decrease to values observed in controls matched for apo(a) type. Controversial data on Lp(a) in diabetes mellitus mainly result from insufficient sample sizes in numerous studies. Large studies and those including apo(a) phenotype analysis have come to the conclusion that Lp(a) levels are not or only moderately elevated in insulin-dependent patients. In non-insulin-dependent diabetics Lp(a) is not elevated. Several rare disorders, such as LCAT and LPL deficiency, as well as liver diseases and abetalipoproteinemia are associated with low plasma levels or lack of Lp(a). |
10067681 | The objective of this open study was to evaluate the response of non-immune health-care workers to two doses of live attenuated varicella vaccine given two months apart. One hundred subjects (58 females; aged 17-49 yr, mean 22.8 yr) received two doses of varicella vaccine. Blood samples for antibody estimation were taken before vaccination, 2 months after the first dose and 6 weeks after the second dose. Reactions were recorded daily in diaries by the vaccinees and controlled by telephone contacts by the investigators. Ninety-four of 99 vaccinees (94.9%, 95% CL 88.6, 98.3) had detectable antibodies after the first dose [titers 4-1024, geometric mean titer (GMT): 53.2 (95% CL 42.4, 66.8)]. After the second dose, all vaccinees had antibodies (100%, 95% CL 96.6, 100.0) [titers 32-2048, GMT: 235.6 (95% CL 199.0, 278.8)]. Mild reactions limited to the injection site occurred in 1 in 4 subjects after each dose. Vesicular rashes occurred in one subject after the 1st dose and in 3 subjects after the 2nd dose, 1 subject was febrile (38.2 degrees C) after the 1st dose. Eighty-one subjects were retested 12 months after the second vaccination. Three had become seronegative (one developed mild varicella 2 months later). Two had boosted their titers (one after mild clinical varicella 1 month earlier, the other after close contact with clinical cases). The GMT of the group had fallen to 83.6 (95% CL 65.4, 106.8). The identification and vaccination of seronegative health-care workers is safe and efficient, and will benefit the workers themselves and the communities in which they work. |
10068655 | Normal B-lymphocyte maturation and proliferation are regulated by chemotactic cytokines (chemokines), and genetic polymorphisms in chemokines and chemokine receptors modify progression of human immunodeficiency virus-1 (HIV-1) infection. Therefore, 746 HIV-1-infected persons were examined for associations of previously described stromal cell-derived factor 1 (SDF-1) chemokine and CCR5 and CCR2 chemokine receptor gene variants with the risk of B-cell non-Hodgkin's lymphoma (NHL). The SDF1-3'A chemokine variant, which is carried by 37% of whites and 11% of blacks, was associated with approximate doubling of the NHL risk in heterozygotes and roughly a fourfold increase in homozygotes. After a median follow-up of 11.7 years, NHL developed in 6 (19%) of 30 SDF1-3'A/3'A homozygotes and 22 (10%) of 202 SDF1-+/3'A heterozygotes, compared with 24 (5%) of 514 wild-type subjects. The acquired immunodeficiency syndrome (AIDS)-protective chemokine receptor variant CCR5-triangle up32 was highly protective against NHL, whereas the AIDS-protective variant CCR2-64I had no significant effect. Racial differences in SDF1-3'A frequency may contribute to the lower risk of HIV-1-associated NHL in blacks compared with whites. SDF-1 genotyping of HIV-1-infected patients may identify subgroups warranting enhanced monitoring and targeted interventions to reduce the risk of NHL. |
10068734 | BACKGROUND:
The acquired immunodeficiency syndrome (AIDS) has transformed in a illness pandemic and it is thought that 120 million of people will be infected by the year 2000. About thirty five percent of HIV positive patients will have rectal manifestations during their illness, and from these the most important anorectal manifestation are perianal sepsis, anal condyloma, hemorrhoidal disease, chronic diarrhea syndrome, anal ulcer and anorectal tumors.
PURPOSE:
To determinate in our medical environment which anorectal manifestation have the most frequency in HIV positive patients.
PATIENTS AND METHOD:
We developed a linear prospective, comparative and observational trial between December 1993 and December 1994, which included 83 patients distributed in 4 groups: 1) HIV homosexual patients with AIDS, 2) positive HIV homosexual patients without AIDS, 3) negative HIV homosexual patients, 4) negative HIV heterosexual patients. The statistical analysis was done through a chi 2 (Chi square) test.
RESULTS:
In homosexual HIV patients with the disease, the most common lesion was the anal ulcer (55%). In positive HIV homosexual patients without disease and negative HIV homosexual patients the most frequent lesion is Condyloma acuminata (48 y 84%). In negative HIV heterosexual patients the most frequent disease was anal fistula (40%) and hemorrhoidal disease (36%).
CONCLUSION:
In negative HIV patients and positive HIV patients without disease the most frequent anorectal lesion is condyloma acuminata; when immunosuppression begins by AIDS, anal ulcer appears and is transformed in the most frequent anorectal disease in AIDS patients. |
10068917 | Although anecdotal reports suggest that anxiety and depressive disorders may be precipitated by acute infectious mononucleosis (AIM), there are few population-based studies measuring distress and psychiatric disorder during and after infection. The purpose of this research was to study the prevalence of psychiatric disorders and psychological distress in patients with AIM at initial infection and over the subsequent 6 months. In addition, we examined the correlation of baseline biopsychosocial factors with distress at 2 and 6 months postillness. A population-based cohort with AIM was surveyed at initial infection and at 2- and 6-month follow-up visits. Measures included physical and laboratory examinations, trait and state measures of psychological and somatic distress, locus of control, social support, and functioning. Patients also received a structured psychiatric interview during the initial infection. Although transient psychological distress was common during acute infection, few patients met criteria for DSM-III-R psychiatric illness. Greater distress at 2 months was associated with significantly lower social functioning in the month prior to diagnosis and higher aspartate aminotransferase (SGOT/AST) levels, less confidence in the physician and health care system (locus of control), and less severe physical symptoms of AIM at baseline. Greater distress at 6 months was associated with an increased number of adverse life events in the 6 months after developing AIM and more days of reduced activity in the 2 weeks prior to the onset of AIM. This population-based study suggests that few subjects develop DSM-III-R psychiatric disorders with AIM. Both biological and psychosocial factors are highly correlated with psychosocial distress at 2 months, whereas psychosocial factors are more important at 6-month follow-up. |
10069303 | PURPOSE:
To determine the incidence of bacteremia, urinary tract infections, and unsuspected bacterial meningitis in a cohort of children diagnosed with febrile seizures.
METHODS:
We assembled a retrospective, consecutive case series of patients who presented to an urban tertiary care pediatric emergency department for evaluation of febrile seizures during a consecutive 12- month period. A febrile seizure was defined as a convulsion associated with a temperature > or = 38.0 degrees C occurring in a child < or = 6 years. Children with initial laboratory evidence of meningoencephalitis in the emergency department (>8 white blood cells per milliliter of cerebrospinal fluid), known seizure disorders, chronic neurologic disease, or documented immunodeficiencies were excluded.
RESULTS:
There were 243 eligible patient encounters among 218 patients during the study period. The mean age was 1.9+/-0.96 years (range 0.3-5.9, median 1.7), and 156 (64.2%) were male. Of the 243 encounters, 214 (88.1%) were for simple febrile seizures and 29 (11.9%) were for complex febrile seizures. Blood cultures were performed during 206/243 encounters (84.8%), and 6/206 (2.9%, 95%CI 0.6-5.2%) were positive, all for Streptococcus pneumoniae. All six positive cultures occurred among the 154 encounters in children 3 to 36 months with a temperature > or = 39.0 degrees C and no pretreatment with antibiotics (incidence 6/154 or 3.9%, 95% CI 0.9-6.9%). Urine cultures were performed during 130/243 encounters (53.5%), and 1/130 (0.7%, 95% CI 0.0-2.2%) yielded a bacterial pathogen. Cerebrospinal fluid analysis was performed during 66/243 encounters (27.2%), and 0/66 (0.0%, 95% CI 0.0-4.5%) yielded bacterial pathogens.
CONCLUSIONS:
Patients presenting for evaluation of febrile seizures are not at increased risk for bacteremia or urinary tract infections. Bacterial meningitis in the absence of initial laboratory evidence of meningoencephalitis is very uncommon in children diagnosed with febrile seizures. |
10069707 | The RSH/Smith-Lemli-Opitz syndrome (RSH/SLOS) is a relatively common, autosomal recessive malformation syndrome comprising distinctive facial, limb and genital anomalies, and mental retardation. Most patients with a clinical diagnosis of RSH/SLOS have a defect of cholesterol biosynthesis at the level of 3beta-hydroxysteroid-delta7-reductase, resulting in a decreased level of cholesterol and an increased level of 7-dehydrocholesterol (7DHC) in body fluids and tissues. We report on our experience with the prenatal diagnosis of RSH/SLOS by quantitative sterol chromatography in amniotic fluid (AF) and chorionic villus (CV). Of 76 AF and nine CV samples analyzed for various indications, 20 were diagnostic of RSH/SLOS based on an increased level of 7DHC in the fluid or tissue. Of 39 fetuses at a 25% risk for RSH/SLOS, 10(25.6%) were affected. Twenty-nine pregnancies not known to be at risk for RSH/SLOS were studied because of either a fetal abnormality characteristic of RSH/SLOS detected by ultrasound, a low maternal serum uE3 level (MSuE3), or both. None of the pregnancies tested, because of a low MSuE3 but lacking a sonographic abnormality characteristic of RSH/SLOS, was affected. However, three of four pregnancies with a low MSuE3 and an RSH/SLOS-type fetal abnormality were positive. RSH/ SLOS was diagnosed in two additional pregnancies on which MSuE3 data were not available but in which fetal anomalies were identified. Of these five RSH/SLOS fetuses identified in pregnancies not otherwise at risk for RSH/SLOS, the presenting sonographic anomaly was either polydactyly, ambiguous genitalia, or both. Evaluation of the biochemical parameters and clinical severity of RSH/SLOS showed that there was an inverse correlation between clinical severity and both the level of AF 7DHC and the level of MSuE3. Based on these earlier and more extensive studies, we conclude that accurate prenatal diagnosis of RSH/ SLOS is possible by sterol analysis of AF and, most likely, CV specimens as well. Furthermore, our findings suggest that MSuE3 levels in combination with sonography may provide useful diagnostic and prognostic information in the absence of a family history of RSH/SLOS. |
10070249 | Current estimates indicate that 60 million people are at risk of infection with human African trypanosomiasis or sleeping sickness, with about 300,000 new cases each year. However, less than 4 million people are under surveillance and only 10% of new cases are diagnosed and treated. This report of a WHO Expert Committee reviews current epidemiological information on African trypanosomiasis and its vectors, and evaluates recent advances in drug treatment and the development of tools for the control and surveillance of the disease. The report provides examples of treatment schedules, vector control operations, indicators for monitoring control and surveillance activities and sample calculations for analysing the cost-effectiveness of different strategies, as well as details of methods for cryopreservation of trypanosome-infected blood samples and a description of traps and screens for the control of the insect vector, Glossina. Although primarily addressed to health policy-makers in countries endemic for sleeping sickness, this report will also be a useful reference source for health care staff at all levels, including physicians, nurses, auxiliary staff and students, as well as those engaged in research on the disease. |
10071427 | BACKGROUND:
The prevalence of varicella zoster virus (VZV) infection has been poorly studied in Latin America. The aim of this work was to study the seroprevalence of antibody to VZV infection in Mexico. Infection was determined in 3,737 individuals.
METHODS:
Samples were collected during a national serologic survey performed during 1987-1988 and represented individuals 1- to 29-years-old from all socioeconomic levels and from rural and urban communities throughout the country. Antibodies anti-VZV were measured with a commercially available enzyme-linked immunosorbent assay (VARELISA Merck, Germany).
RESULTS:
In the population studied, 464 individuals (12.4%) were seronegative or susceptible to infection, whereas about 17.0% of individuals 1- to 19-years-old were susceptible to infection. Between the ages of 20 to 24 years, 8.4% were susceptible and between 25 to 29 years, 5.0% of persons were still susceptible to infection.
CONCLUSIONS:
Socioeconomic level, density of population, crowding, and gender were not found as risk factors for susceptibility to VZV infection in adolescents and young adults. Low educational level was found as a risk factor for susceptibility. High proportions of adolescents and young adults in Mexico are susceptible to VZV infection and should receive special attention when designing vaccination programs. |
10072150 | Sub-Saharan Africa has the highest reported cholera incidence and mortality rates in the world. In 1997, a cholera epidemic occurred in western Kenya. Between June 1997 and March 1998, 14,275 cholera admissions to hospitals in Nyanza Province in western Kenya were reported. There were 547 deaths (case fatality rate = 4%). Of 31 Vibrio cholerae O1 isolates tested, all but one were sensitive to tetracycline. We performed a case-control study among 61 cholera patients and age-, sex-, and clinic-matched controls. Multivariate analysis showed that risk factors for cholera were drinking water from Lake Victoria or from a stream, sharing food with a person with watery diarrhea, and attending funeral feasts. Compared with other diarrheal pathogens, cholera was more common among persons living in a village bordering Lake Victoria. Cholera has become an important public health concern in western Kenya, and may become an endemic pathogen in the region. |
10073903 | Different origins for trisomy 15 mosaicism confined to the placenta have been suggested. We have analysed the data on trisomy 15 mosaicism in EUCROMIC. Trisomy 15 mosaicism or non-mosaic feto-placental discrepancy on CVS was registered in 0.027 per cent of samples karyotyped (34/126 465): 28/34 had confined placental mosaicism (CPM), 1/34 was probably true fetal mosaicism and 5/34 could not be classified. In 17 of the 28 pregnancies with CPM, cytogenetic information existed on both cytotrophoblast lineage (direct CVS preparation or short-term incubation) and extra-embryonic mesoderm, EEM (villus culture): CPM was of type I (restricted to the cytotrophoblast) in 5/17 (29 per cent); type II (restricted to the EEM) in 4/17 (24 per cent) and type III (both cytotrophoblast and EEM) in 8/17 (47 per cent). Testing for uniparental disomy (UPD) for chromosome 15 in the fetus or child was done in nine cases, showing upd(15)mat in 1/9, and biparental inheritance in 8/9. Upd(15)mat, clinically diagnosed due to Prader Willi syndrome, but without DNA analysis, was registered in one additional liveborn child. Analysis of these 17 cases, in conjunction with 10 similar reports in the literature also having cytogenetic data from both cell lineages, indicates two categories of trisomy 15 CPM. One has a high proportion of trisomic cells, often with a type III distribution, and an observed high risk of UPD and adverse pregnancy outcome. The second has lower proportions of trisomic cells, primarily of type I or II distribution, and a lower empirical risk of UPD or pregnancy loss. Based on this cytogenetic analysis, supported by the available DNA data, we suggest that, in contrast to trisomy 16 CPM, the trisomic cell line originates from a meiotic error in only about 50 per cent of cases of trisomy 15 CPM, the rest being the result of post-zygotic, mitotic non-disjunction. Despite this, we recommend amniocentesis following the finding of a mosaic or non-mosaic trisomy 15 by CVS, in order to exclude both UPD and potential true fetal mosaicism. |
10074012 | OBJECTIVE:
To test the hypothesis that non-diabetic dizygotic and monozygotic twin siblings of patients with type 1 diabetes have a similar high prevalence of islet cell autoantibodies, thus suggesting that islet cell autoimmunity is mainly environmentally determined.
DESIGN:
Prospective twin study.
SETTING:
Two specialist centres for diabetes in the United States.
PARTICIPANTS:
Non-diabetic monozygotic twin (n=53), dizygotic twin (n=30), and non-twin (n=149) siblings of patients with type 1 diabetes; 101 controls.
MAIN OUTCOME MEASURES:
Analysis of progression to diabetes and expression of anti-islet autoantibodies.
RESULTS:
Monozygotic twin siblings had a higher risk of progression to diabetes (12/53) than dizygotic twin siblings (0/30; P<0.005). At the last follow up 22 (41.5%) monozygotic twin siblings expressed autoantibodies compared with 6 (20%) dizygotic twin siblings (P<0.05), 16 (10.7%) non-twin siblings (P<0.0001), and 6 (5.9%) controls (P<0.0001). Monozygotic twin siblings expressed multiple (>/=2) antibodies more often than dizygotic twin siblings (10/38 v 1/23; P<0.05). By life table analysis the probability of developing positive autoantibodies was higher among the monozygotic twin siblings bearing the diabetes associated HLA DQ8/DQ2 genotype than in those without this genotype (64.2% (95% confidence interval 32.5% to 96%) v 23.5% (7% to 40%) at 10 years of discordance; P<0.05).
CONCLUSION:
Monozygotic and dizygotic twins differ in progression to diabetes and expression of islet cell autoantibodies. Dizygotic twin siblings are similar to non-twin siblings. These two observations suggest that genetic factors play an important part in determination of islet cell autoimmunity, thus rejecting the hypothesis. In addition, there is a high penetrance of islet cell autoimmunity in DQ8/DQ2 monozygotic twin siblings. |
10074505 | From May to December 1997, 18 cases of mild to severe respiratory illness caused by avian influenza A (H5N1) viruses were identified in Hong Kong. The emergence of an avian virus in the human population prompted an epidemiological investigation to determine the extent of human-to-human transmission of the virus and risk factors associated with infection. The hemagglutination inhibition (HI) assay, the standard method for serologic detection of influenza virus infection in humans, has been shown to be less sensitive for the detection of antibodies induced by avian influenza viruses. Therefore, we developed a more sensitive microneutralization assay to detect antibodies to avian influenza in humans. Direct comparison of an HI assay and the microneutralization assay demonstrated that the latter was substantially more sensitive in detecting human antibodies to H5N1 virus in infected individuals. An H5-specific indirect enzyme-linked immunosorbent assay (ELISA) was also established to test children's sera. The sensitivity and specificity of the microneutralization assay were compared with those of an H5-specific indirect ELISA. When combined with a confirmatory H5-specific Western blot test, the specificities of both assays were improved. Maximum sensitivity (80%) and specificity (96%) for the detection of anti-H5 antibody in adults aged 18 to 59 years were achieved by using the microneutralization assay combined with Western blotting. Maximum sensitivity (100%) and specificity (100%) in detecting anti-H5 antibody in sera obtained from children less than 15 years of age were achieved by using ELISA combined with Western blotting. This new test algorithm is being used for the seroepidemiologic investigations of the avian H5N1 influenza outbreak. |
10075229 | OBJECTIVE:
To establish the association between the use of contraceptives and the prevalence of sexually transmitted diseases (STD) and other reproductive tract infections (RTI).
METHODS:
840 women who used contraception and who attended the Fundação Nossa Senhora do Bom Sucesso's Family Planning Clinic (FNSBS-FPC) over a 2-year period (1993-1994) were studied. All women answered a standard epidemiological survey and underwent a clinical laboratory assessment. The Chi-square test and a logistic regression model were used for statistical analysis.
RESULTS:
The majority of women were young (58.7%); low educational achievers (59.0%); middle or working class (85.0%); had a fixed partner (79.8%), and were of non-African origin (95.6%). Of the 627 women who responded, 4.1% stated that their sexual behavior was of high risk. The prevalence of any infection and particularly of bacterial vaginosis (BV), was highest among users of the intra-uterine device (IUD). Use of an IUD (P = 0.001) and high risk behavior (P = 0.04) were the variables associated to presence of a STD/RTI in multiple regression analysis.
CONCLUSION:
Results suggest that STD/RTIs basically occur due to high risk behavior and that, with the exception of an association between use of IUD and BV, the method of contraception does not affect the incidence of these infections. |
10075231 | HIV infection was recognized as a new sexually transmitted disease (STD) at the beginning of the last decade. The knowledge of risk factors for sexual transmission of HIV changed the focus on STD to a broader perspective for prevention and control of HIV infection, and consequently of STD. Barriers to STD control include cultural aspects, difficulties in changing sexual behavior, asymptomatic disease in women and expensive and inaccessible tests for diagnosis. The classical clinical approach based on etiologic treatment has never been achieved by developing countries. The international community has been searching for new approaches. Syndromic management and mass treatment are strategies recently found as useful. Nevertheless the best approach to endocervicitis by Neisseria gonorrhoeae and Chlamydia trachomatis remain problematic. Then, the current approach to STD management must include: prompt attention to every patient seeking care for STD; early diagnosis and treatment; delivery of short term treatment at the clinic; education on STD/HIV; screening for other STDs with pre- and post-test counseling; counseling on risk reduction; provision of condoms; integration of STD services with family planning, prenatal and gynecological services. |
10075317 | Celiac disease is a permanent intolerance to ingested gluten that results in immunologically mediated inflammatory damage to the small-intestinal mucosa. Celiac disease is associated with both human leukocyte antigen (HLA) and non-HLA genes and with other immune disorders, notably juvenile diabetes and thyroid disease. The classic sprue syndrome of steatorrhea and malnutrition coupled with multiple deficiency states may be less common than more subtle and often monosymptomatic presentations of the disease. Diverse problems such as dental anomalies, short stature, osteopenic bone disease, lactose intolerance, infertility, and nonspecific abdominal pain among many others may be the only manifestations of celiac disease. The rate at which celiac disease is diagnosed depends on the level of suspicion for the disease. Although diagnosis relies on intestinal biopsy findings, serologic tests are useful as screening tools and as an adjunct to diagnosis. The treatment of celiac disease is lifelong avoidance of dietary gluten. Gluten-free diets are now readily achievable with appropriate professional instruction and community support. Both benign and malignant complications of celiac disease occur but these can often be avoided by early diagnosis and compliance with a gluten-free diet. |
10077151 | Several polymorphic glutathione S-transferase enzymes are involved in the detoxification of active metabolites of many potential carcinogens from tobacco smoke and may therefore be important in modulating susceptibility to smoking-related cancers. As part of a hospital-based case-control study performed in France among Caucasian smokers, we studied GSTM1, GSTM3, GSTP1 and GSTT1 gene polymorphisms in 121 patients with oral cavity and pharyngeal cancers and 172 hospital controls using peripheral blood DNA. An increase in risk was found among carriers of the GSTP1 (AG or GG) genotype (OR 1.6, 95% CI 1.0-2.8, p = 0.07) or the GSTT1 null genotype (OR 2.0, 95% CI 1.0-4.0, p = 0.05). The effect of these at-risk genotypes was most marked in subjects with a history of more than 30 years of smoking, among whom the respective ORs were 2.0 (95% CI 1.0-3.9) and 3.3 (95% CI 1.3-8.1), though the interaction tests between these genotypes and duration of smoking were not significant. In contrast, neither the GSTM1 null genotype nor the GSTM3 AA genotype was associated with oropharyngeal cancer risk (OR 0.9, 95% CI 0.5-1.5 and OR = 1.3, 95% CI 0.7-2.3, respectively). Our results thus suggest that GSTP1 and GSTT1 gene polymorphisms modulate susceptibility to smoking-related cancers of the oral cavity and pharynx. |
End of preview.
No dataset card yet
New: Create and edit this dataset card directly on the website!
Contribute a Dataset Card- Downloads last month
- 0