Parallel pathogens in the upper and lower respiratory tracts in children with a respiratory tract infection, as revealed by the Filmarray assay

The spectrum of pathogens is mostly concordant in the upper and lower respiratory tract. Collecting NPS for detection can be a non-invasive and more convenient option compared with BALF. Although co-infection is common in children with an RTI, the clinical significance of co-infection remains unclear and warrants further analysis.