Box-and-whisker plots of rhinovirus (RV) real-time reverse-transcription polymerase
chain reaction cycle threshold (Ct) values obtained from respiratory specimens from
patients with RV-A, RV-B, and RV-C infections and comparing patients with RV-C with
and without RV viremia. Note that of 56 patients with RV-C viremias, only 55 had
corresponding RV-C detections from respiratory specimens (*). Whiskers mark the lowest
and highest Ct values; boxes are bounded by the 25th and 75th percentiles; and box
bisecting lines represent median Ct values. Sample size is indicated for each
category. Differences (Δ) in median Ct values for each category are given as well as
P values calculated by the Mann-Whitney U test.
Abbreviations: Ct, cycle threshold; NP/OP, nasopharyngeal/oropharyngeal; NS, not
significant, rRT-PCR, real-time reverse-transcription polymerase chain reaction; RV,
rhinovirus.