text_1: Bacterial meningitis can be diagnosed on the basis of positive cerebrospinal fluid (CSF) cultures.
text_2: Five studies of 587 patients compared atraumatic needles with standard needles and found a nonsignificant decrease in the odds of headache with an atraumatic needle (absolute risk reduction [ARR], 12.3%; 95% confidence interval [CI], -1.72% to 26.2%).