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A study was undertaken to assess the utility of the xTAG respiratory viral panel (RVP) for enhanced laboratory investigation of respiratory outbreaks. Specimens (n = 1,108) from 244 suspected respiratory virus outbreaks in 2006 and 2007 in Alberta, Canada, were included in the study. Testing by direct fluorescent antigen detection (DFA) and various in-house nucleic acid amplification tests (NATs) for common respiratory viruses provided an etiological diagnosis in 177 outbreaks (72.5%), with 524 samples testing positive (47.3%) for a respiratory virus. Two hundred samples from 51 unresolved outbreaks were further tested by RVP retrospectively. Fifty-eight samples from 30 unresolved outbreaks had a respiratory virus detected by RVP (47 picornavirus-positive, 9 coronavirus-positive, and 2 influenza virus A-positive samples). Overall, detection of a viral etiological agent was achieved in 90.8% of outbreaks using a combination of DFA, NATs, and RVP. Use of RVP enhances the laboratory investigation of respiratory virus outbreaks and facilitates appropriate patient and outbreak management.

Enhanced Viral Etiological Diagnosis of Respiratory System Infection Outbreaks by Use of a Multitarget Nucleic Acid Amplification Assay