Primary Article

Continuous Non-seasonal Epidemic of Respiratory Syncytial Virus Infection in the Southeast United States

Authors: DIANE C. HALSTEAD PhD, STEPHEN G. JENKINS PhD

Abstract

Abstract Background.This study was done to define the seasonality of respiratory syncytial virus (RSV) epidemics in the southeastern United States. Methods.We tested 5,092 fresh nasal aspirates or washings, using the Kallestad Pathfinder enzyme immunoassay (EIA) or the Directigen RSV membrane EIA according to manufacturers' directions. Results.A total of 1,419 (27.9%) respiratory specimens, collected from pediatric patients between May 1993 and December 1996 at two large southeastern medical centers, were positive for RSV antigen by enzyme immunoassay. A persistent RSV epidemic was documented between July 1993 and December 1996. We defined an epidemic as 2 consecutive months in each of which ≥10% of the specimens were positive and ≥2 positive specimens detected. The highest percentages of positive specimens were detected in December of 1993, 1994, and 1996, to date, and November 1995. Conclusion.On the basis of our findings, we recommend health care workers consider RSV in the differential diagnosis of acute respiratory illness throughout the year in pediatric patients from the southeast United States.

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References