COVID-19 remains a serious emerging global health problem,and little is known about the role of oropharynx commensal microbes in infection susceptibility and severity.Here,we present the oropharyngeal microbiota chara...COVID-19 remains a serious emerging global health problem,and little is known about the role of oropharynx commensal microbes in infection susceptibility and severity.Here,we present the oropharyngeal microbiota characteristics identified by shotgun metagenomic sequencing analyses of oropharynx swab specimens from 31 COVID-19 patients,29 influenza B patients,and 28 healthy controls.Our results revealed a distinct oropharyngeal microbiota composition in the COVID-19 patients,characterized by enrichment of opportunistic pathogens such as Veillonella and Megasphaera and depletion of Pseudopropionibacterium,Rothia,and Streptococcus.Based on the relative abundance of the oropharyngeal microbiome,we built a microbial classifier to distinguish COVID-19 patients from flu patients and healthy controls with an AUC of 0.889,in which Veillonella was identified as the most prominent biomarker for COVID-19 group.Several members of the genus Veillonella,especially Veillonella parvula which was highly enriched in the oropharynx of our COVID-19 patients,were also overrepresented in the BALF of COVID-19 patients,indicating that the oral cavity acts as a natural reservoir for pathogens to induce co-infections in the lungs of COVID-19 patients.We also found the increased ratios of Klebsiella sp.,Acinetobacter sp.,and Serratia sp.were correlated with both disease severity and elevated systemic inflammation markers(neutrophil-lymphocyte ratio,NLR),suggesting that these oropharynx microbiota alterations may impact COVID-19 severity by influencing the inflammatory response.Moreover,the oropharyngeal microbiome of COVID-19 patients exhibited a significant enrichment in amino acid metabolism and xenobiotic biodegradation and metabolism.In addition,all 26 drug classes of antimicrobial resistance genes were detected in the COVID-19 group,and were significantly enriched in critical cases.In conclusion,we found that oropharyngeal microbiota alterations and functional differences were associated with COVID-19 severity.展开更多
基金The authors thank the Heilongjiang Province Oral Microecological Technology Innovation Center for providing technical support,and the funding of Heilongjiang Province Applied Technology Research and Development Program(GA20C003,GA20C006)the Medical Science Research Fund of Beijing Medical and Health Foundation(YWJKJJHKYJJ-B20284EN)the Program for Innovation Research of Heilongjiang Provincial Hospital and the National Natural Science Foundation of China(31825008 and 31422014 to Z.H.and 61872117 to F.Zha).
文摘COVID-19 remains a serious emerging global health problem,and little is known about the role of oropharynx commensal microbes in infection susceptibility and severity.Here,we present the oropharyngeal microbiota characteristics identified by shotgun metagenomic sequencing analyses of oropharynx swab specimens from 31 COVID-19 patients,29 influenza B patients,and 28 healthy controls.Our results revealed a distinct oropharyngeal microbiota composition in the COVID-19 patients,characterized by enrichment of opportunistic pathogens such as Veillonella and Megasphaera and depletion of Pseudopropionibacterium,Rothia,and Streptococcus.Based on the relative abundance of the oropharyngeal microbiome,we built a microbial classifier to distinguish COVID-19 patients from flu patients and healthy controls with an AUC of 0.889,in which Veillonella was identified as the most prominent biomarker for COVID-19 group.Several members of the genus Veillonella,especially Veillonella parvula which was highly enriched in the oropharynx of our COVID-19 patients,were also overrepresented in the BALF of COVID-19 patients,indicating that the oral cavity acts as a natural reservoir for pathogens to induce co-infections in the lungs of COVID-19 patients.We also found the increased ratios of Klebsiella sp.,Acinetobacter sp.,and Serratia sp.were correlated with both disease severity and elevated systemic inflammation markers(neutrophil-lymphocyte ratio,NLR),suggesting that these oropharynx microbiota alterations may impact COVID-19 severity by influencing the inflammatory response.Moreover,the oropharyngeal microbiome of COVID-19 patients exhibited a significant enrichment in amino acid metabolism and xenobiotic biodegradation and metabolism.In addition,all 26 drug classes of antimicrobial resistance genes were detected in the COVID-19 group,and were significantly enriched in critical cases.In conclusion,we found that oropharyngeal microbiota alterations and functional differences were associated with COVID-19 severity.
