biostudies-literatureZhu XRevitalizing of Seed Industry—the Open Competition Mechanism to Select the Best Candidates ProjectsRevitalizing of Seed Industry - the Open Competition Mechanism to Select the Best Candidates ProjectsNatural Science Foundation of Jiangsu ProvinceNational Key Research and Development Project2198https://www.ebi.ac.uk/biostudies/studies/S-EPMC9699015biostudies-literatureUnknown10(11)<i>Aeromonas veronii</i> is as an important opportunist pathogen of many aquatic animals, which is wildly distributed in various aquatic environments. In this study, a dominant bacterium GJL1 isolated from diseased <i>M. salmoides</i> was identified as <i>A. veronii</i> according to the morphological, physiological, and biochemical characteristics, as well as molecular identification. Detection of the virulence genes showed the isolate GJL1 carried outer membrane protein A (<i>ompA</i>), flagellin (<i>flgA</i>, <i>flgM</i>, <i>flgN</i>), aerolysin (<i>aer</i>), cytolytic enterotoxin (<i>act</i>), DNases (<i>exu</i>), and hemolysin (<i>hly</i>), and the isolate GJL1 also produced caseinase, lipase, gelatinase, and hemolysin. The virulence of strain GJL1 was confirmed by experimental infectiMicroorganismsPathogenicity of <i>Aeromonas veronii</i> Causing Mass Mortality of Largemouth Bass (<i>Micropterus salmoides</i>) and Its Induced Host Immune Response.PMC9699015BK20220584JBGS [2021] 1322019YFD0900305Zhu YZhang XWu CJiang QZhu XQian QGao XWang JLiu GfalsePathogenicity of <i>Aeromonas veronii</i> Causing Mass Mortality of Largemouth Bass (<i>Micropterus salmoides</i>) and Its Induced Host Immune Response.<i>Aeromonas veronii</i> is as an important opportunist pathogen of many aquatic animals, which is wildly distributed in various aquatic environments. In this study, a dominant bacterium GJL1 isolated from diseased <i>M. salmoides</i> was identified as <i>A. veronii</i> according to the morphological, physiological, and biochemical characteristics, as well as molecular identification. Detection of the virulence genes showed the isolate GJL1 carried outer membrane protein A (<i>ompA</i>), flagellin (<i>flgA</i>, <i>flgM</i>, <i>flgN</i>), aerolysin (<i>aer</i>), cytolytic enterotoxin (<i>act</i>), DNases (<i>exu</i>), and hemolysin (<i>hly</i>), and the isolate GJL1 also produced caseinase, lipase, gelatinase, and hemolysin. The virulence of strain GJL1 was confirmed by experimental infecti2022-01-01T00:00:00Z2022 Nov2026-04-08T11:04:36.25Z2024-11-20T23:30:30.424ZS-EPMC96990153636379010.3390/microorganisms10112198