Parainfluenza Virus Types 1-3 Infections Among Children and Adults Hospitalized with Community-Acquired Pneumonia

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
Leigh M HowardCarlos G Grijalva

Abstract

Parainfluenza virus (PIV) is a leading cause of lower respiratory tract infections. Although there are several distinct PIV serotypes, few studies have compared the clinical characteristics and severity of infection among the individual PIV serotypes and between PIV and other pathogens in patients with community-acquired pneumonia. We conducted active population-based surveillance for radiographically confirmed community-acquired pneumonia hospitalizations among children and adults in eight United States hospitals with systematic collection of clinical data and respiratory, blood, and serological specimens for pathogen detection. We compared clinical features of PIV-associated pneumonia among individual serotypes 1, 2, and 3 and among all PIV infections with other viral, atypical, and bacterial pneumonias. We also compared in-hospital disease severity among groups employing an ordinal scale (mild, moderate, severe) using multivariable proportional odds regression. PIV was more commonly detected in children (155/2354 [6.6%]) than in adults (66/2297 [2.9%]) (p<0.001). Other pathogens were commonly co-detected among PIV cases (110/221 [50%]). Clinical features of PIV-1, PIV-2, and PIV-3 infections were similar to one another in bo...Continue Reading

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