892. Epidemiology, clinical features, and outcomes of Rhinovirus/Enterovirus in older adults hospitalized with acute respiratory infections and those with CHF and COPD exacerbations

BACKGROUND: While Rhinovirus/Enterovirus (RV/EV) infections are common, the clinical characteristics of infections in hospitalized adults are not fully understood. METHODS: Adults ≥ 50 years of age hospitalized for Acute Respiratory Infections (ARI) or exacerbations of CHF or COPD in two hospitals in Atlanta, GA during the 2018-2019 and 2019-2020 respiratory seasons were offered enrollment. Following informed consent, participants were tested via BioFire® FilmArray® respiratory panels of nasopharyngeal and oropharyngeal swabs (combined), and standard-of-care molecular testing results were also recorded. Subjects were considered positive for RV/EV if any method of testing resulted positive. Baseline characteristics and clinical features were gathered via subject interviews and medical record abstractions. Variables were compared between subjects with RV/EV and two control groups: those negative for all pathogens and those negative for only RV/EV. Participants with RV/EV who had co-infections were excluded from the analysis. Descriptive statistics were performed using SAS v9.4. RESULTS: Of 1429 enrolled participants, 123 (8.6%) were positive for RV/EV, of whom 111 had RV/EV alone. When compared to those negative for all tested pathogens (n=1034), participants with RV/EV more commonly had underlying COPD (45.0% vs. 35.5%, P=0.047) and less commonly had CHF (36.0% vs. 48.3%, P=0.014) or experienced acute myocardial dysfunction (29.7% vs. 41.2%, P=0.019). Participants with RV/EV also more commonly experienced fever (39.6% vs. 27.7%, P=0.008), cough (90.1% vs. 69.0%, P< 0.001), sore throat (54.1% vs. 39.5%, P=0.003), chest pain (48.6% vs. 37.8%, P=0.026), and dyspnea/respiratory distress (25.2% vs. 13.1%, P< 0.001) than those negative for all pathogens. Differences between RV/EV positive and negative groups were similar to the all pathogen negative group, with the exception of no significant differences in acute myocardial dysfunction, fever, and COPD in the RV/EV negative group. [Figure: see text] CONCLUSION: Among older adults hospitalized with ARIs, CHF, and/or COPD exacerbations, RV/EV was associated with symptoms of both upper and lower respiratory tract infection and was more frequent identified among those with COPD. DISCLOSURES: Elizabeth Begier, M.D., M.P.H., Pfizer: EB is an employee of Pfizer, the sponsor of this study|Pfizer: Stocks/Bonds Robin Hubler, MS, Pfizer, Inc.: Employee|Pfizer, Inc.: Stocks/Bonds Qing Liu, M.S., Pfizer Inc.: Stocks/Bonds Bradford J. Gessner, M.D., M.P.H., Pfizer: I am an employee of Pfizer|Pfizer: Stocks/Bonds Benjamin Lopman, PhD, Epidemiological Research and Methods, LLC: Advisor/Consultant|Hillevax, Inc: Advisor/Consultant Satoshi Kamidani, MD, CDC: Grant/Research Support|Emergent BioSolutions: Grant/Research Support|NIH: Grant/Research Support|Pfizer Inc: Grant/Research Support Nadine Rouphael, MD, Icon, EMMES, Sanofi, Seqirus, Moderna: Advisor/Consultant Evan J. Anderson, MD, GSK: Advisor/Consultant|GSK: Grant/Research Support|Janssen: Advisor/Consultant|Janssen: Grant/Research Support|Kentucky Bioprocessing, Inc.: Safety Monitoring Board|Moderna: Advisor/Consultant|Moderna: Grant/Research Support|Moderna: Currently an employee|Moderna: Stocks/Bonds|Pfizer: Advisor/Consultant|Pfizer: Grant/Research Support|Sanofi Pasteur: Advisor/Consultant|Sanofi Pasteur: Grant/Research Support|Sanofi Pasteur: Safety Monitoring Board|WCG/ACI Clinical: Data Adjudication Board Christina A. Rostad, MD, BioFire Inc.: Grant/Research Support|GlaxoSmithKline Biologicals: Grant/Research Support|Janssen: Grant/Research Support|MedImmune LLC: Grant/Research Support|Meissa Vaccines, Inc.: RSV vaccine technology|Merck & Co., Inc.: Grant/Research Support|Micron Technology, Inc.: Grant/Research Support|Moderna, Inc.: Grant/Research Support|Novavax: Grant/Research Support|PaxVax: Grant/Research Support|Pfizer, Inc.: Grant/Research Support|Regeneron: Grant/Research Support|Sanofi Pasteur: Grant/Research Support