The salivary microbiota of patients with acute lower respiratory tract infection-A multicenter cohort study.

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ID: 278383
2024
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Abstract
The human microbiome contributes to health and disease, but the oral microbiota is understudied relative to the gut microbiota. The salivary microbiota is easily accessible, underexplored, and may provide insight into response to infections. We sought to determine the composition, association with clinical features, and heterogeneity of the salivary microbiota in patients with acute lower respiratory tract infection (LRTI). We conducted a multicenter prospective cohort study of 147 adults with acute LRTI presenting to the emergency department of seven hospitals in three states (Pennsylvania, Michigan, and Ohio) between May 2017 and November 2018. Salivary samples were collected in the emergency department, at days 2-5 if hospitalized, and at day 30, as well as fecal samples if patients were willing. We compared salivary microbiota profiles from patients to those of healthy adult volunteers by sequencing and analyzing bacterial 16-rRNA. Compared to healthy volunteers, the salivary microbiota of patients with LRTI was highly distinct and strongly enriched with intestinal anaerobes such as Bacteroidaceae, Ruminococcaceae, and Lachnospiraceae (e.g., mean 10% relative abundance of Bacteroides vs < 1% in healthy volunteers). Within the LRTI population, COPD exacerbation was associated with altered salivary microbiota composition compared to other LRTI conditions. The largest determinant of microbiota variation within the LRTI population was geography (city in which the hospital was located).
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Authors Rogers, Matthew B;Harner, Ashley;Buhay, Megan;Firek, Brian;Methé, Barbara;Morris, Alison;Palmer, Octavia M Peck;Promes, Susan B;Sherwin, Robert L;Southerland, Lauren;Vieira, Alexandre R;Yende, Sachin;Morowitz, Michael J;Huang, David T;
Journal PloS one
Year 2024
DOI
e0290062
URL
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