Pathogenicity of Plesiomonas shigelloides and Citrobacter freundii isolated from the endangered Chinese sturgeon (Acipenser sinensis)
文献类型： 外文期刊
作者： Deng, Dan 1 ; Mu, Zizi 1 ; Lv, Xiaoyan 1 ; Jiang, Xincheng 1 ; Zhou, Jiang 1 ; Guo, Huizhi 1 ; Zhang, Wenbing 1 ; Wang, Bei 2 ; Lu, Yishan 2 ; Wu, Jinping 3 ; Du, Hao 3 ; Zhang, Shuhuan 4 ; Xu, Qiaoqing 1 ; Wei, Qiwei 3 ;
作者机构： 1.Yangtze Univ, Engn Res Ctr Ecol & Agr Use Wetland, Minist Educ, Jingzhou 434024, Peoples R China
2.Guangdong Ocean Univ, Guangdong Prov Key Lab Aquat Anim Dis Control & Hl, Zhanjiang 524008, Peoples R China
3.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Key Lab Freshwater Biodivers Conservat, Minist Agr, Wuhan 430223, Peoples R China
4.Guizhou Univ Tradit Chinese Med, Basic Med Coll, Sturgeon Hlth Breeding & Med Value Res Ctr, Guiyang 550025, Peoples R China
关键词： Chinese sturgeon; Histopathological change; P; shigelloides; C; freundii; LD50; Pathogenesis; Antimicrobial susceptibility
期刊名称：MICROBIAL PATHOGENESIS （ 影响因子：3.848； 五年影响因子：3.957 ）
ISSN： 0882-4010
年卷期： 2022 年 173 卷
页码：
收录情况： SCI
摘要： Chinese sturgeon (Acipenser sinensis) is an indigenous species of China and is listed as a critically endangered species. Recently, second filial generations of Chinese sturgeon in the Yangtze River Fisheries Research Institute suffered from a severe disease. In this study, two kinds of pathogenic bacteria were isolated from diseased sturgeon and identified as Plesiomonas shigelloides and Citrobacter freundii, based on 16S rDNA gene sequence alignment analysis. Antimicrobial susceptibility testing showed that P. shigelloides was resistant to ampicillin, penicillin, midecamycin, oxacillin, and clindamycin; and sensitive to tocefatriaxone, piperacillin, cefoperazone, cefazolin, and ciprofloxacin. C. freundii was resistant to ampicillin, penicillin, midecamycin, oxacillin, and clindamycin; and sensitive to chloramphenicol, cefuroxime, norfloxacin, ciprofloxacin, and ceftazidime. The median lethal dose (LD50) values of P. shigelloides and C. freundii were 4.50 x 10(3) colony forming units (CFU)/g and 3.20 x 10(3) CFU/g, respectively. Clinical symptoms of challenged sturgeons were the same as those of naturally infected sturgeons. Histopathological examination disclosed severe damage in the viscera of P. shigelloides and C. freundii-infected sturgeons. This is the first report suggesting that P. shigelloides infection is associated with mortality of Chinese sturgeon. The results of this study revealed the pathogenesis and severe pathogenicity of P. shigelloides and C. freundii in cultured Chinese sturgeon, and offer insights into the prevention and treatment of bacterial infection caused by P. shigelloides and C. freundii in cultured sturgeons.
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