数字农科院2.0

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： Wenzhi Liu;Mengmeng Li;Mingyang Xue;Yong Zhou;Nan Jiang;Yan Meng;Yisha Liu;Jingwen Jiang;Xiaolin Liao;Yuding Fan

作者机构：

关键词： Aeromonas veronii;blood parameters;bronze gudgeon (Coreius heterodon);phylogenetic analysis;virulence genes

期刊名称： Animals

ISSN： 2076-2615

年卷期： 2024 年 14 卷 16 期

页码：

收录情况： SCIE（2024版）

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 × 106 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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