Rhinovirus (RV) role in pathogenesis of severe childhood disease remains controversial. We aimed to explore the association between RV molecular subtyping, nasopharyngeal viral loads and viremia with childhood pneumonia. Nasopharyngeal and blood samples from cases and controls were tested for RV and the 5′ non-coding region sequenced. The cases compared to controls had a similar prevalence of RV detection in the nasopharynx (23 % vs. 22 %, P = 0.66), similar RV species distribution (A, B, C = 44 %, 8%, 44 % vs. 48 %, 7%, 38 %; respectively; P = 0.66) and similar viral load (4.0 and 3.7 log10 copies/mL, P = 0.062). However, RV-viremia was 4.01-fold (aOR 95 % CI: 1.26-12.78) more prevalent among cases (7%) than controls (2%), P = 0.019. Furthermore, among cases and controls RV-C was more commonly associated with viremia (14 % and 4%, P = 0.023), than RV-A (2% and 1%; P = 0.529). Thus RV-viremia could be used as a measure for attributing causality to RV in children hospitalized for pneumonia.Copyright © 2020 The Authors. Published by Elsevier B.V. All rights reserved.
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