中国畜牧兽医 ›› 2014, Vol. 41 ›› Issue (9): 235-239.

• 疾病防治 • 上一篇    下一篇

丁鲑鱼鳗弧菌16S rDNA基因及耐药性分析

李雪峰, 王利, 王海娟, 赵静   

  1. 西南民族大学生命科学与技术学院, 动物遗传育种学国家民委—教育部重点实验室, 四川成都 610041
  • 收稿日期:2014-02-27 出版日期:2014-09-20 发布日期:2014-09-24
  • 通讯作者: 王利 E-mail:qinxin916@aliyun.com
  • 作者简介:李雪峰(1989- ),男,湖南人,硕士生,研究方向:微生物遗传学。
  • 基金资助:

    四川省科技支撑项目(2013FZ0014);西南民族大学研究生创新型科研项目(CX2014SZ111);西南民族大学研究生学位点建设项目(2013XWD-S071007)。

16S rDNA Gene and Drug Resistance Analysis of Vibrio anguillarum Isolated from Tincaeus

LI Xue-feng, WANG Li, WANG Hai-juan, ZHAO Jing   

  1. Key Laboratory of Animal Genetics and Breeding, State Ethnic Affairs Commission & Ministry of Education, College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China
  • Received:2014-02-27 Online:2014-09-20 Published:2014-09-24

摘要: 从发病丁鲑鱼体内分离出菌株SK-1,对其进行形态观察、生理生化试验、16S rDNA基因序列分析,并采用Kriby-Bauer纸片扩散法进行耐药性分析。结果表明,菌株SK-1为革兰氏阴性菌,呈短杆状,氧化酶阳性,生理生化特性与鳗弧菌一致。获得16S rDNA序列长度为1447 bp,GenBank数据库中登录号为KF978124。该菌株16S rDNA基因序列与GenBank数据库中鳗弧菌的16S rDNA基因序列相似性高达99%,系统进化树显示其与鳗弧菌亲缘关系最近,从而判定菌株SK-1为鳗弧菌。该菌株对杆菌肽与洁霉素耐药,但是对强力霉素、四环素、美满霉素等13种药物高度敏感,对链霉素、头孢曲松、甲氧苄啶等9种药物中度敏感。这为鳗弧菌的鉴定及细菌病防治提供科学依据。

关键词: 丁鲑鱼; 鳗弧菌; 16S rDNA; 耐药性

Abstract: Strain SK-1 was isolated from naturally infected Tincaeus. Its morphological, physiological and biochemical experiments, 16S rDNA sequence were performed, and its antibiotic sensitivity was analyzed by Kriby-Bauer disc diffusion method. The results showed that strain SK-1 was gram negative bacteria,with short rod shape and oxidase-positive.Its physiological and biochemical characteristics were consistent with the physiological and biochemical characteristics of Vibrio anguillarum. The length of this 16S rDNA sequence was 1447 bp, which showed 99% homology with Vibrio anguillarum, GenBank database number was KF978124. Phylogenetic analysis indicated it grouped together with Vibrio anguillarum. So it was confirmed that strain SK-1 was Vibrio anguillarum. The antibiotic sensitivity presented that strain SK-1 was highly sensitive to 13 antibiotics such as doxycycline,tetracycline,minocycline, and middle sensitive to 9 antibiotics such as streptomycin, ceftriaxone, trimethoprim, and resistant to bacitracin and lincomycin. These results will be beneficial to the identification of Vibrio anguillarum and prevention and control of bacterial disease in Tincaeus.

Key words: Tincaeus; Vibrio anguillarum; 16S rDNA; drug resistance

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