Identification of Aeromonas veronii as the Pathogen Associated with Massive Mortality in Bronze Gudgeon (Coreius heterodon)
文献类型： 外文期刊
作者： Liu, Wenzhi 1 ; Li, Mengmeng 1 ; Xue, Mingyang 1 ; Zhou, Yong 1 ; Jiang, Nan 1 ; Meng, Yan 1 ; Liu, Yisha 1 ; Jiang, Jingwen 1 ; Liao, Xiaolin 4 ; Fan, Yuding 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China
2.Chinese Acad Agr Sci, Grad Sch, Beijing 100081, Peoples R China
3.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
4.Hunan Agr Univ, Fisheries Coll, Changsha 410128, Peoples R China
关键词： bronze gudgeon (Coreius heterodon); Aeromonas veronii; virulence genes; blood parameters; phylogenetic analysis
期刊名称：ANIMALS （ 影响因子：2.7； 五年影响因子：3.2 ）
ISSN： 2076-2615
年卷期： 2024 年 14 卷 16 期
页码：
收录情况： SCI
摘要： Aeromonas veronii, an opportunistic pathogen toward aquatic organisms, was identified as the causative pathogen (isolate WH10) in diseased bronze gudgeon via bacterial isolation, and morphological, physiological, biochemical, and molecular characterization. WH10 exerted its pathogenicity via five virulence genes, including those encoding cytotoxic enterotoxins (act and alt), lipase (lip), a quorum sensing-controlled virulence factor (LuxS), and a Type III secretion system inner membrane component (ascV). WH10 was shown to be sensitive to compound sulfamethoxazoles, cefothiophene, doxycycline, and sulfamethoxazole. Toward bronze gudgeon, WH10 had a median lethal dose (LD50) of 1.36 x 10(6) colony forming units/mL. Analysis of blood parameters of diseased fish revealed significant increases in monocytes and neutrophils, but decreased numbers of lymphocytes. Serum aspartate aminotransferase activity and triglyceride concentration were significantly higher in diseased fish than in healthy fish. The reverse was noted for alkaline phosphatase, total protein, albumin, total cholesterol, and glucose. Thus, Aeromonas veronii is implicated as the causative agent of the mass mortality observed in bronze gudgeon, warranting further investigations into the diagnosis, epidemiology, prevention, and treatment of this infectious disease.
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