《中国畜牧兽医》---唯一指定的官方网站 ›› 2015, Vol. 42 ›› Issue (6): 1592-1596.doi: 10.16431/j.cnki.1671-7236.2015.06.040

• 疾病防治 • 上一篇    下一篇

一株大鳞大麻哈鱼源鲑肾杆菌的检测与鉴定

徐立蒲1, 王静波1, 张文1, 王小亮1, 曹欢1, 王姝1, 潘勇1, 江育林2   

  1. 1. 北京市水产技术推广站, 北京 100021;
    2. 中国检验检疫科学研究院动物检疫研究所, 北京 100029
  • 修回日期:2015-02-10 出版日期:2015-06-20 发布日期:2015-07-23
  • 通讯作者: 江育林 E-mail:yulinjiangpost@gmail.com
  • 作者简介:徐立蒲(1972-),男,黑龙江哈尔滨人,博士,研究员,从事鱼病诊断防控工作,E-mail:xulipu001@163.com
  • 基金资助:

    北京市鲟鱼、鲑鳟鱼创新团队(SCGWZJ 20141104-3)

Detection and Identification of a Strain of Renibacterium salmoninarum Sourced from Cultured Chinook Salmon (Oncorhynchus tshawytscha)

XU Li-pu1, WANG Jing-bo1, ZHANG Wen1, WANG Xiao-liang1, CAO Huan1, WANG Shu1, PAN Yong1, JIANG Yu-lin2   

  1. 1. Beijing Fisheries Technical Extention Station, Beijing 100021, China;
    2. Institute of Animal Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100029, China
  • Revised:2015-02-10 Online:2015-06-20 Published:2015-07-23

摘要: 北京怀柔某养殖场的大鳞大麻哈鱼发生一种慢性,但累计死亡率很高的流行病,为研究大鳞大麻哈鱼感染病原菌的种类,本试验根据病鱼临床症状观察判断疑似感染鲑肾杆菌.试验对病鱼肾脏组织进行印片染色观察细菌形态特征,抽提病鱼的肝脏、肾脏组织DNA,扩增16S rDNA和鲑肾杆菌P57表面蛋白基因片段,测序并运用BLAST进行同源性比对.结果显示,病鱼肾脏组织印片在显微镜下可见大量形态一致的革兰氏阳性短杆菌;采用病鱼肝脏、肾脏组织扩增的16S rDNA基因构建的系统发育树显示与鲑肾杆菌聚为一支;通过PCR扩增出鲑肾杆菌P57表面蛋白基因DNA片段,测序结果与鲑肾杆菌标准株ATCC 33209完全一致,符合率为100%.结果表明病鱼感染鲑肾杆菌并引发细菌性肾病(BKD).这是中国首次在养殖鱼体内检出鲑肾杆菌.

关键词: 鲑肾杆菌; 细菌性肾病; 大鳞大马哈鱼

Abstract: A chronic and infective disease occurred on the farmed Chinook salmon (Oncorhynchus tshaivytscha) in a farm in Huairou district of Beijing and it caused high accumulative mortality.The typical clinical symptoms indicated that it might be bacterial kidney disease (BKD).The purpose of this study was to confirm its pathogen.The typical clinical symptoms of sick fish,morphology observation of bacteria in kidney tissue smears and sequence analysis of bacteria DNA were conducted.A number of gram positive brevi bacteria were observed in kidney tissue print.16S rDNA sequence of K1 strain was more than 99% homology with that of Renibacterium salmoninarum and they were in the same cluster.383 and 320 bp fragment were amplified by PCR and nested PCR.The fragments were sequenced and analyzed.The results showed the fragment was shared 100% nucleotide identity with P57 surface protein gene of Renibacterium salmoninarum. It was indicated that these diseased fish were suffering from BKD caused by Renibacterium salmoninarum.This was the first report about Renibacterium salmoninarum detected in farmed fish in China.

Key words: Renibacterium salmoninarum; bacterial kidney disease (BKD); Chinook salmon (Oncorhynchus tshawytscha)

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