Sarah K Lucas1, Robert Yang2, Jordan M Dunitz3, Holly C Boyer4, Ryan C Hunter5. 1. Department of Microbiology & Immunology, University of Minnesota, USA. Electronic address: lucas156@umn.edu. 2. Department of Otolaryngology, Head and Neck Surgery, University of Minnesota, USA. Electronic address: yang3375@umn.edu. 3. Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, University of Minnesota, USA. Electronic address: dunit001@umn.edu. 4. Department of Otolaryngology, Head and Neck Surgery, University of Minnesota, USA. Electronic address: boyer011@umn.edu. 5. Department of Microbiology & Immunology, University of Minnesota, USA. Electronic address: rchunter@umn.edu.
Abstract
BACKGROUND: Metastasis of upper airway microbiota may have significant implications in the development of chronic lung disease. Here, we compare bacterial communities of matched sinus and lung mucus samples from cystic fibrosis (CF) subjects undergoing endoscopic surgery for treatment of chronic sinusitis. METHODS: Mucus from one maxillary sinus and expectorated sputum were collected from twelve patients. 16S rRNA gene sequencing was then performed on sample pairs to compare the structure and function of CF airway microbiota. RESULTS: Bacterial diversity was comparable between airway sites, though sinuses harbored a higher prevalence of dominant microorganisms. Ordination analyses revealed that samples clustered more consistently by airway niche rather than by individual. Finally, predicted metagenomes suggested that anaerobiosis was enriched in the lung. CONCLUSIONS: Our findings indicate that while the lung may be seeded by individual sinus pathogens, airway microenvironments harbor distinct bacterial communities that should be considered in selecting antimicrobial therapies.
BACKGROUND: Metastasis of upper airway microbiota may have significant implications in the development of chronic lung disease. Here, we compare bacterial communities of matched sinus and lung mucus samples from cystic fibrosis (CF) subjects undergoing endoscopic surgery for treatment of chronic sinusitis. METHODS: Mucus from one maxillary sinus and expectorated sputum were collected from twelve patients. 16S rRNA gene sequencing was then performed on sample pairs to compare the structure and function of CF airway microbiota. RESULTS: Bacterial diversity was comparable between airway sites, though sinuses harbored a higher prevalence of dominant microorganisms. Ordination analyses revealed that samples clustered more consistently by airway niche rather than by individual. Finally, predicted metagenomes suggested that anaerobiosis was enriched in the lung. CONCLUSIONS: Our findings indicate that while the lung may be seeded by individual sinus pathogens, airway microenvironments harbor distinct bacterial communities that should be considered in selecting antimicrobial therapies.
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