This study was supported by the Thrasher Research Fund (Salt Lake City, UT) and an investigator-initiated research grant from MedImmune (Gaithersburg, MD).
Prospective Multicenter Study of the Viral Etiology of Bronchiolitis in the Emergency Department
Article first published online: 7 FEB 2008
© 2008 by the Society for Academic Emergency Medicine
Academic Emergency Medicine
Volume 15, Issue 2, pages 111–118, February 2008
How to Cite
Mansbach, J. M., McAdam, A. J., Clark, S., Hain, P. D., Flood, R. G., Acholonu, U. and Camargo, C. A. (2008), Prospective Multicenter Study of the Viral Etiology of Bronchiolitis in the Emergency Department. Academic Emergency Medicine, 15: 111–118. doi: 10.1111/j.1553-2712.2007.00034.x
- Issue published online: 7 FEB 2008
- Article first published online: 7 FEB 2008
- Received July 24, 2007; revision received October 3, 2007; accepted October 19, 2007.
- respiratory syncytial virus;
Objectives: To determine the viral etiology of bronchiolitis and clinical characteristics of children age < 2 years presenting to the emergency department (ED) with bronchiolitis.
Methods: The authors conducted a 14-center prospective cohort study during 2005–2006 of ED patients age < 2 years with bronchiolitis. The study was conducted in 10 states as part of the Emergency Medicine Network. Researchers collected nasopharyngeal aspirates and conducted structured interviews, medical record reviews, and 2-week follow-up telephone calls. Samples were tested using reverse transcription polymerase chain reaction for respiratory syncytial virus (RSV), rhinovirus (RV), human metapneumovirus (hMPV), and influenza viruses (Flu).
Results: Testing of 277 samples revealed 176 (64%) positive for RSV, 44 (16%) for RV, 26 (9%) for hMPV, 17 (6%) for Flu A, and none for Flu B. When children were categorized as RSV only, RV only, RV and RSV, and all others (hMPV, Flu, no identified virus), children with RV only were more likely to be African American (19, 62, 14, and 40%, respectively; p < 0.001) and have a history of wheezing (23, 52, 21, and 15%, respectively; p = 0.01). In multivariate models, children with RV were more likely to receive corticosteroids (odds ratio [OR] 3.5; 95% confidence interval [CI] = 1.5 to 8.15). The duration of illness may be shorter for children with RV (Days 8, 3, 6, and 8; p = 0.07).
Conclusions: In this multicenter study, RSV was the most frequent cause of bronchiolitis (64%). RV was present in 16%, and these children have a distinct profile in terms of demographics, medical history, and ED treatment.