sentence: However , it must be kept in mind that infections with other viruses such as Parainfluenza or Respiratory Syncytial Virus could be related to the clinical symptoms shared with MP.In our study , no correlation was found between the MLVA type and the different symptomatology , in contrast to what was described by Yan et al ., 43 where the MLVA was linked to the clinical outcome , although this group also found that some MLVA types , irrespective of their susceptibility profile , showed a higher risk of progression to severe MP pneumonia.MLs are the first-line treatment for children with MP pneumonia in our country.44 Fluoroquinolones and tetracyclines are generally avoided in this population due to their side effects ,45 although countries with high rates of ML-resistant strains ( such as Japan ) have approved tosufloxacin or minocycline as second-line drugs for children with MP pneumonia who respond poorly to MLs.46 Several studies reporting MLr have been published .