The use of a multiplex real-time PCR assay for diagnosing acute respiratory viral infections in children attending an emergency unit

Background: The use of a multiplex molecular technique to identify the etiological pathogen of respiratory viral infections might be a support as clinical signs are not characteristic. Objectives: The aim of the study was to evaluate a multiplex molecular real-time assay for the routine diagnosis of respiratory viruses, to analyze the symptoms associated with the pathogens detected and to determine the spread of virus during the period. Study design: Respiratory samples were collected from children presenting with respiratory symptoms and attending the emergency unit during the 2010-2011 winter seasons. Samples were tested with the multiplex RespiFinder (R) 15 assay (PathoFinder (TM)) which potentially detects 15 viruses. Results: 857 (88.7%) of the 966 samples collected from 914 children were positive for one (683 samples) or multiple viruses (174 samples). The most prevalent were the respiratory syncytial virus (39.5%) and the rhinovirus (24.4%). Influenza viruses were detected in 139 (14.4%) samples. Adenovirus was detected in 93 (9.6%) samples, coronaviruses in 88 (9.1%), metapneumovirus in 51 (5.3%) and parainfluenzae in 47 (4.9%). Rhinovirus (40%) was the most prevalent pathogen in upper respiratory tract infections while respiratory syncytial virus (49.9%) was the most prevalent in lower respiratory tract infections. Co-infections were associated with severe respiratory symptoms. Conclusion: The multiplex assay detected clinically important viruses in a single genomic test and thus will be useful for detecting several viruses causing respiratory tract disorders. (C) 2014 Elsevier B.V. All rights reserved.