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However, research on its genetic diversity and pathogenicity-related genetic elements based on whole genome sequences is lacking. In this study, we collected and sequenced 130 strains of \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic> from 14 provinces of China, and also determined the susceptibility of 35 of the strains to 30 different antibiotics. Combined with 52 publicly available \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic> genomes, we inferred the population structure and investigated the characteristics of pathogenicity-related factors. The \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic> strains exhibited high levels of homologous recombination and were assigned to two major populations, VflPop1 and VflPop2, according to the different compositions of their gene pools. VflPop2 was subdivided into groups 2.1 and 2.2. Except for VflPop2.2, which consisted only of Asian strains, the strains in VflPop1 and VflPop2.1 were distributed in the Americas, Asia and Europe. Analysis of the pathogenicity potential of \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic> showed that most of the identified virulence-related genes or gene clusters showed high prevalence in \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic>, except for three mobile genetic elements: pBD146, ICEVfl<\/jats:italic>Ind1 and MGIVfl<\/jats:italic>Ind1, which were scattered in only a few strains. A total of 21 antimicrobial resistance genes were identified in the genomes of the 182 strains analysed in this study, and 19 (90%) of them were exclusively present in VflPop2. Notably, the tetracycline resistance-related gene tet<\/jats:italic>(35) was present in 150 (95%) of the strains in VflPop2, and in only one (4%) strain in VflPop1, indicating it was population-specific. In total, 91% of the 35 selected strains showed resistance to cefazolin, indicating \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic> has a high resistance rate to cefazolin. Among the 15 genomes that carried the previously reported drug resistance-related plasmid pBD146, 11 (73%) showed resistance to trimethoprim-sulfamethoxazole, which we inferred was related to the presence of the dfr6<\/jats:italic> gene in the plasmid. On the basis of the population genomics analysis, the genetic diversity, population structure and distribution of pathogenicity-related factors of \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic> were delineated in this study. The results will provide further clues regarding the evolution and pathogenic mechanisms of \n \n V. fluvialis<\/jats:ext-link>\n <\/jats:named-content>\n <\/jats:italic>, and improve our knowledge for the prevention and control of this pathogen.<\/jats:p>","DOI":"10.1099\/mgen.0.000769","type":"journal-article","created":{"date-parts":[[2022,2,25]],"date-time":"2022-02-25T14:16:10Z","timestamp":1645798570000},"source":"Crossref","is-referenced-by-count":16,"title":["Population genomics of the food-borne pathogen Vibrio fluvialis reveals lineage associated pathogenicity-related genetic elements"],"prefix":"10.1099","volume":"8","author":[{"given":"Hongyuan","family":"Zheng","sequence":"first","affiliation":[{"name":"State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, PR China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuanming","family":"Huang","sequence":"additional","affiliation":[{"name":"State 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