2314. Burden of Respiratory Syncytial Virus (RSV) Infection Among Hospitalized Older Adults and Those with Underlying Chronic Obstructive Pulmonary Disease (COPD) or Congestive Heart Failure (CHF)

Abstract

Background. Data are limited about the burden of respiratory syncytial virus (RSV)-related hospitalizations in older adults and those with COPD or CHF. Methods. We conducted prospective surveillance at two hospitals from October 2018 to March 2019 for adults ≥50 years of age admitted with acute respiratory infections (ARI) and adults of any age with COPD or CHF-related admissions. Adults were eligible if they were residents of an 8 county region in Atlanta, Georgia. Asymptomatic adults ≥50 years of age were enrolled as controls. Nasopharyngeal and oropharyngeal swabs were tested for RSV and influenza (Flu) using BioFire® FilmArray® Respiratory Viral Panel (RVP) and acute/convalescent serology was obtained for RSV antibodies detection by enzyme immunoassay against RSV lysate. Standard of care results were included for enrollees. We compare the number of RSV+, Flu+ and RSV-/Flu- cases along with demographic features and outcomes. Results. We screened 12,453 patients to identify 1,515 eligible adults of which 617 (41%) were enrolled. The most common reasons for failing to enroll were refusal (676, 75%) and inability to obtain informed consent (221, 25%). Of the 617, 36 (6%) were RSV+ and 41 (7%) were Flu+. RSV was detected in 1/126 (0.8%) and Flu in 0/126 healthy controls. RSV+ occurred earlier in surveillance and peaked at a higher frequency (figure). Clinical characteristics and outcomes are in the table. In a convenience sample, a four-fold rise in RSV antibody titer was detected among 8/15 RSV+, 0/42 RSV-/Flu-, and 0/42 healthy controls. Conclusion. The burden and outcomes for RSV are similar to Flu in adults admitted to the hospital with ARI, CHF, or COPD. A vaccine for RSV would be beneficial. (Figure Presented).