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Mycobacterium marinum is the causative agent of splenic and renal granulomas in half-smooth tongue sole (Cynoglossus semilaevis Gunther) in China

文献类型： 外文期刊

作者： Luo, Zhang 1 ; Li, Jie 2 ; Zhang, Zhengguo 1 ; Hao, Shuang 1 ; Bai, Xiaohui 1 ; You, Hongzheng 1 ; Mo, Zhaolan 2 ; Feng, 1 ;

作者机构： 1.Tianjin Fishery Res Inst, 442 Jiefangnan Rd, Tianjin 300221, Peoples R China

2.Chinese Acad Fishery Sci, Lab Marine Fisheries & Aquaculture, Qingdao Natl Lab MarineSci & Technol,Yellow Sea F, Key Lab Maricultural Organism Dis Control,Minist, 106 Nanjing Rd, Qingdao 266071, Peoples R China

关键词： Mycobacteriosis; Mycobacterium marinum; Granuloma; Cynoglossus semilaevis

期刊名称：AQUACULTURE （ 影响因子：4.242； 五年影响因子：4.723 ）

ISSN： 0044-8486

年卷期： 2018 年 490 卷

页码：

收录情况： SCI

摘要： The half-smooth tongue sole (Cynoglossus semilaevis Gunther) is a major cultivated marine fish species of high economic value. However, splenic and renal granulomas disease is a major disease of C. semilaevis and results in high mortality; its first outbreak was reported in 2009, and the pathogen responsible was believed to be associated with an unidentified virus. In this study, we investigated the prevalence of this disease in three fish farms located in different cities; we isolated homogeneous colonies from affected fish from each farm. Healthy half-smooth tongue sole were subjected to bacterial challenge tests by intraperitoneal injection of 0.5x10(7) cfu/fish of the isolates from each farm. The accumulative mortality rate was > 80% within 30 days post infection. Diseased sole displayed symptoms similar to those seen in naturally infected fish. These strains were all identified as Mycobacterium marinum based on bacterial morphology, analytical profile index identification and 16S rDNA sequencing. The results of this study suggest that M. marinum is the causal agent of splenic and renal granulomas disease in half-smooth tongue sole; therefore, more attention should be paid to the occurrence of this bacterium in the flat fish aquaculture industry in China.

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