Topography of respiratory tract and gut microbiota in mice with influenza A virus infection

Journal Article · 21 February 2023 · Frontiers in Microbiology

DOI: https://doi.org/10.3389/fmicb.2023.1129690 · OSTI ID:1958227

Chen, Qichao; Liu, Manjiao; Lin, Yanfeng; Wang, Kaiying; Li, Jinhui; Li, Peihan; Yang, Lang; Jia, Leili; Zhang, Bei; Guo, Hao; Li, Peng; Song, Hongbin

Introduction Influenza A virus (IAV)-induced dysbiosis may predispose to severe bacterial superinfections. Most studies have focused on the microbiota of single mucosal surfaces; consequently, the relationships between microbiota at different anatomic sites in IAV-infected mice have not been fully studied. Methods We characterized respiratory and gut microbiota using full-length 16S rRNA gene sequencing by Nanopore sequencers and compared the nasopharyngeal, oropharyngeal, lung and gut microbiomes in healthy and IAV-infected mice. Results The oropharyngeal, lung and gut microbiota of healthy mice were dominated by Lactobacillus spp., while nasopharyngeal microbiota were comprised primarily of Streptococcus spp. However, the oropharyngeal, nasopharyngeal, lung, and gut microbiota of IAV-infected mice were dominated by Pseudomonas, Escherichia , Streptococcus , and Muribaculum spp., respectively. Lactobacillus murinus was identified as a biomarker and was reduced at all sites in IAV-infected mice. The microbiota composition of lung was more similar to that of the nasopharynx than the oropharynx in healthy mice. Discussion These findings suggest that the main source of lung microbiota in mice differs from that of adults. Moreover, the similarity between the nasopharyngeal and lung microbiota was increased in IAV-infected mice. We found that IAV infection reduced the similarity between the gut and oropharyngeal microbiota. L. murinus was identified as a biomarker of IAV infection and may be an important target for intervention in post-influenza bacterial superinfections.

• Sponsoring Organization: USDOE Office of Electricity (OE), Advanced Grid Research & Development. Power Systems Engineering Research
• OSTI ID: 1958227
• Journal Information: Frontiers in Microbiology, Journal Name: Frontiers in Microbiology Vol. 14; ISSN 1664-302X
• Publisher: Frontiers Media SACopyright Statement
• Country of Publication: Switzerland
• Language: English