《中国畜牧兽医》 ›› 2017, Vol. 44 ›› Issue (4): 1203-1210.doi: 10.16431/j.cnki.1671-7236.2017.04.037

• 基础兽医 • 上一篇    下一篇

牦牛源肠球菌的分离鉴定及耐药性分析

徐凤, 张焕容, 梁华, 诸明欣, 汤承   

  1. 西南民族大学生命科学与技术学院, 成都 610041
  • 收稿日期:2016-08-06 出版日期:2017-04-20 发布日期:2017-05-03
  • 通讯作者: 张焕容 E-mail:727746768@qq.com
  • 作者简介:徐凤(1989-),女,重庆人,硕士生,研究方向:动物传染病防控,E-mail:xufeng352011@163.com
  • 基金资助:

    "十三五"国家重点研发计划课题(2016YFD0500907);西南民族大学研究生创新课题(CX2016ZS146);兽医专业学位研究生教育实践基地建设

Isolation,Identification and Antibiotics Resistance Analysis of Enterococcus from Yak

XU Feng, ZHANG Huan-rong, LIANG Hua, ZHU Ming-xin, TANG Cheng   

  1. College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China
  • Received:2016-08-06 Online:2017-04-20 Published:2017-05-03

摘要:

试验结合革兰氏染色及16S rRNA分子鉴定,对分离自红原县的17份牦牛粪便样中的肠球菌进行鉴定。结果显示,通过细菌分离纯化及PCR扩增,从牦牛粪便样品中分离出8株疑似肠球菌,分离菌的扩增产物经凝胶电泳后均产生1 500 bp特异性条带。16S rRNA测序结果显示,8株疑似肠球菌中,6株为粪肠球菌,2株为屎肠球菌。同源性比对分析显示,粪肠球菌与参考序列同源性为99.7%~100.0%,屎肠球菌与参考序列同源性为98.2%~99.2%,说明牦牛源肠球菌在遗传进化过程中高度保守。运用K-B纸片法进行药敏试验,结果显示,分离株对氨基糖苷类抗生素耐受性较高,2株屎肠球菌中,11-1-2菌株表现为5重耐药,且该菌株耐万古霉素,粪肠球菌主要表现为3重耐药,药敏结果提示牦牛源肠球菌耐药较严重,应引起高度重视。

关键词: 牦牛; 肠球菌; 分离鉴定; 药敏试验

Abstract:

17 feces samples of yak which were collected in Hongyuan county were measured with Gram staining method and 16S rRNA molecular identification in this study.8 suspected Enterococcus were separate from feces samples by bacteria purification and PCR amplification with 1 500 bp specific band. 6Enterococcus faecalis and 2Enterococcus faecium were identified through 16S rRNA sequencing.The homology analysis of the strains revealed that the homology between Enterococcus faecalis and reference strains sequence were 99.7% to 100%,that of Enterococcus faecium and reference sequence were 98.2% to 99.2%,indicating that the yak Enterococcus was highly conserved in the process of genetic evolution.The drug sensitive test results showed that the isolated strains were highly resistance to aminoglycoside antibiotics.Enterococcus faecium 11-1-2 strain was not only 5 multi-resistant,but also showed resistence to vancomycin.Enterococcus faecalis strains was most 3 multi-resistant.The antibiotics resistance results revealed that the resistance of yak Enterococcus was serious and should be taken seriously.

Key words: yak; Enterococcus; isolation and identification; antibiotics resistance test

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