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： Jiang, Jingwen 1 ; Xue, Mingyang 1 ; Liu, Wenzhi 1 ; Jiang, Nan 1 ; Zhou, Yong 1 ; Liu, Yisha 1 ; Li, Mengmeng 1 ; Zhong, Qiwang 4 ; Fan, Yuding 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China
2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
3.Chinese Acad Agr Sci, Grad Sch, Beijing 100083, Peoples R China
4.Jiangxi Agr Univ, Coll Biosci & Bioengn, Nanchang 330045, Peoples R China
关键词： Aeromonas hydrophila; Monopterus albus; medicine sensitivity; virulence genes; histopathology
期刊名称：ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH （ 影响因子：0.4； 五年影响因子：0.5 ）
ISSN： 0792-156X
年卷期： 2025 年 77 卷 2 期
页码：
收录情况： SCI
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 x 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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