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Recovery and pathogenicity analysis of Aerococcus viridans isolated from tilapia (Orecohromis niloticus) cultured in southwest of China

文献类型: 外文期刊

作者: Ke, Xiaoli 1 ; Lu, Maixin 1 ; Ye, Xing 1 ; Gao, Fengying 1 ; Zhu, Huaping 1 ; Huang, Zhanghan 1 ;

作者机构: 1.Chinese Acad Fishery Sci, Key Lab Trop & Subtrop Fishery Resource Applicat, Minist Agr, Pearl River Fisheries Res Inst, Guangzhou 510380, Guangdong, Peoples R China

关键词: Tilapia;Aerococcus viridans;Phylogenesis;Histopathology

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: 2012 年 342 卷

页码:

收录情况: SCI

摘要: From April to September in 2010, a sequential epidemic outbreak with a loss of 30-40% occurred in a tilapia fishery in Maoming, Guangdong Province, China. The present study documented the causative agent of the diseased fish that mainly suffered from congestive gill and the abdomen, swelling gallbladder and a severe diffusion in liver. Two isolates were obtained from the diseased fish and the pathogenicity was confirmed by challenge experiments and histopathological analysis. Biochemically, the isolates showed properties and biochemical characteristics both identical to Aerococcus viridans. Sequencing of the 16S rRNA genes revealed that the two isolates were highly homogeneous with A. viridans. Consequently, they were confirmed as A. viridans on the basis of phenotypic characteristics, phylogenetic analysis of the 165 rRNA sequences gene. This work firstly reports the infection and histopathological changes of A. viridans in tilapia. (C) 2012 Elsevier B.V. All rights reserved.

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