Respiratory viruses in acute bronchiolitis in Delhi.

We conducted this trial in a Delhi hospital between January 1 and December 31, 2007 and enrolled 245 infants (1 month to 1 year) with evidence of bronchiolitis (characterized by tachypnea; respiratory rate more than 60 per minute between 1-2 months of age and more than 50 per minute beyond 2 months age; with wheezing or fine crackles) following a written informed consent from parents. Nasopharyngeal aspirates, nasopharyngeal swabs and throat swabs were obtained from them and evaluated at the National Institute of Communicable Diseases (NICD), Delhi. Specimens were processed for viral culture, ELISA and PCR. The study was approved by the hospital research committee.