中国畜牧兽医

• 疾病防治 • 上一篇    

犊牛腹泻大肠杆菌的分离鉴定和耐药性检测

方光远, 张莉, 陆宇超, 顾亚凤, 戴鼎震   

  1. 金陵科技学院动物科学与技术学院, 江苏南京 210038
  • 修回日期:2014-07-01 出版日期:2014-09-20 发布日期:2014-09-24
  • 作者简介:方光远(1965- ),男,江苏人,硕士,副教授,主要从事兽医微生物学和兽医生物制品学教学及研究工作。
  • 基金资助:

    南京市2012年科技发展指导性项目(2012ZD006);2014年金陵科技学院科技创新校级立项项目。

Isolation,Identification and Resistance Testing of E.coli Isolated from Diarrheal Calves

FANG Guang-yuan, ZHANG Li, LU Yu-chao, GU Ya-feng, DAI Ding-zhen   

  1. College of Animal Science and Technology, Jinling Institute of Technology, Nanjing 210038, China
  • Revised:2014-07-01 Online:2014-09-20 Published:2014-09-24

摘要: 为了分析南京地区奶牛场犊牛腹泻的原因,对犊牛腹泻病料进行细菌分离培养,获得了27株细菌。本试验对这些细菌进行了培养特性、染色特性、生化特性、血清型鉴定、药敏试验和TEM、SHV、CTX-M-1、CTX-M-9型超广谱β-内酰胺酶(ESBLs)基因的检测。结果显示27株细菌均为大肠杆菌,只有1株细菌对头孢噻吩、头孢唑啉和头孢呋辛耐药,且此菌株检测出CTX-M-1型超广谱β-内酰胺酶基因。试验结果表明犊牛腹泻是由大肠杆菌引起的,犊牛腹泻大肠杆菌能产生CTX-M-1型超广谱β-内酰胺酶,导致对头孢类抗生素耐药性的发生。

关键词: 犊牛腹泻; 大肠杆菌; 分离鉴定; 耐药性; 检测

Abstract: In order to analyze the causes of calf diarrhea in Nanjing, 27 strains bacteria were isolated from the material of diarrhea calves. The cultured characteristics, staining characteristics, biochemical characteristics, serotype characteristics, drug susceptibility and TEM, SHV, CTX-M-1, CTX-M-9 type extended-spectrum β-lactamase (ESBLs) gene of 27 strains bacteria were detected. The results showed that 27 strains bacteria were all E.coli, and only one bacteria was resistant for cephalothin,cefazolin and cefuroxime,and this strain was detected in CTX-M-1 type extended-spectrum β-lactamase gene. The results showed that calf diarrhea were caused by E.coli, the calf diarrhea E.coli could produce CTX-M-1-type extended-spectrum β-lactamase to resolve cephalosporin antibiotic that led to drug resistance.

Key words: calf diarrhea; E.coli; isolation and identification; resistance; testing

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