数字农科院2.0

Identification and characterization of pathogenic Aeromonas hydrophila isolated from clinically diseased Chinese rice-field eel, Monopterus albus

文献类型： 外文期刊

作者： Jingwen Jiang;Mingyang Xue;Wenzhi Liu;Nan Jiang;Yong Zhou;Yisha Liu;Mengmeng Li;Qiwang Zhong;Yuding Fan

作者机构：

关键词： Aeromonas hydrophila;histopathology;medicine sensitivity;Monopterus albus;virulence genes

期刊名称： Israeli Journal of Aquaculture - Bamidgeh

ISSN： 0792-156X

年卷期： 2025 年 77 卷 2 期

页码：

收录情况： SCIE（2025版）

摘要： Aeromonas hydrophila is recognized as a prevalent pathogenic bacterium in aquaculture. An outbreak of a disease characterized by a high mortality rate has been reported at a Chinese rice-field fish farm (Monopterus albus) located in Hubei Province. This study isolated a causative A. hydrophila strain (YFI-C1) in diseased Monopterus albus through bacterial isolation and subsequent morphological, physiological, biochemical, evolutionary and molecular biology analysis. Ten virulence genes, including those that encode cytotoxic enterotoxins (act and alt), a quorum sensing-controlled virulence factor (LuxS), a temperature-sensitive protease (eprCAI), serine proteinase (ser), haemolysin-aerolysin (aeraA), nuclease (nuc), hemolysin (hlyA), lipase (lip), flagellin (fla) have been shown to be responsible for YFI-C1’s pathogenicity. An artificial infection was utilized to evaluate the pathogenicity of YFI-C1, with a median lethal dose (LD50) of 1 × 106 colony forming units (CFU)/mL. The Kirby-Bauer test was used to measure YFI-C1’s sensitivity to ten antibiotics. According to the findings, YFI-C1 was resistant to Cefothiophene but extremely susceptible to six antibiotics: Ciprofloxacin, Trimethoprim-sulfamethoxazole, Doxycycline, Enrofloxacin, Compound sulfamethoxazoles, and Flufenicol. The results of this study offer valuable insights for future research on bacterial disease prevention and treatment in Monopterus albus.

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