《中国畜牧兽医》 ›› 2017, Vol. 44 ›› Issue (12): 3625-3633.doi: 10.16431/j.cnki.1671-7236.2017.12.033

• 基础兽医 • 上一篇    下一篇

腹泻仔猪肠道致病性大肠埃希氏菌和沙门氏菌的分离鉴定与耐药性研究

李晨1, 张双翔2, 周碧君1, 程振涛1, 文明1, 马光强3, 王伟1, 胡兴义1, 张海1, 丁尊俄1, 王开功1   

  1. 1. 贵州大学动物科学学院, 贵阳 550025;
    2. 贵州省动物疫病预防控制中心, 贵阳 550001;
    3. 水城县农业局, 六盘水 553000
  • 收稿日期:2017-05-08 出版日期:2017-12-20 发布日期:2017-12-20
  • 通讯作者: 王开功 E-mail:120675133@qq.com
  • 作者简介:李晨(1994-),男,贵州赤水人,硕士生,研究方向:病原微生物,E-mail:120675133@qq.com
  • 基金资助:

    贵州省科学技术厅农业攻关项目"贵州省仔猪腹泻性疫病风险分析及综合防控技术研究"(黔科合NY[2015]3009-1号);"贵州省动物疫病防控与兽医公共卫生保障科技创新人才团队"(黔科合人才团队[2015]4016号);贵州省农业委员会科技计划项"贵州省2015年重大动物疫病省级定点监测"[2015-01号]

Isolation, Identification and Drug Resistance Analysis of Interstinal Pathogenic Escherichia coli and Salmonella Isolated from Diarrhea Piglets

LI Chen1, ZHANG Shuang-xiang2, ZHOU Bi-jun1, CHENG Zhen-tao1, WEN Ming1, MA Guang-qiang3, WANG Wei1, HU Xing-yi1, ZHANG Hai1, DING Zun-e1, WANG Kai-gong1   

  1. 1. College of Animal Science, Guizhou University, Guiyang 550025, China;
    2. Guizhou Province Center for Animal Disease Control and Prevention, Guiyang 550001, China;
    3. The Agriculture Bureau of Shuicheng, Liupanshui 553000, China
  • Received:2017-05-08 Online:2017-12-20 Published:2017-12-20

摘要:

为探明仔猪细菌性腹泻肠道致病性大肠埃希氏菌和沙门氏菌流行的血清型、耐药表型及耐药基因型,本试验采集了贵州省5个地(州)市7个规模化养猪场的128份腹泻仔猪肠道样本,并对采集的样本进行了大肠埃希氏菌和沙门氏菌分离与鉴定,通过动物试验鉴定菌株的致病性,利用血清学方法鉴定其血清型,并通过药敏纸片法对主要致病菌进行耐药性研究,采用PCR技术检测各致病菌株耐药相关基因,分析细菌耐药表型和耐药基因型相关性。结果显示,本研究共分离鉴定到78株致病性大肠埃希氏菌与21株沙门氏菌,致病性大肠埃希氏菌血清型以O138、O87为主,沙门氏菌血清型以鼠伤寒沙门氏菌、肠炎沙门氏菌居多;药敏试验结果表明,本试验分离到的78株致病性大肠埃希氏菌对β-内酰胺类药物耐药率达80%以上,对其他种类的抗菌药耐药率均超过40%,分离鉴定的21株沙门氏菌对氨基糖苷类药物耐药率达50%以上,对其他种类的抗菌药耐药率均达20%以上;本试验分离鉴定的致病性大肠埃希氏菌共检出12种耐药相关基因,沙门氏菌共检出10种耐药相关基因,两种细菌耐药基因型与耐药表型符合率均达60%以上,且均为多重耐药。本研究为仔猪腹泻的综合防控提供了理论依据。

关键词: 大肠埃希氏菌; 沙门氏菌; 分离鉴定; 耐药性

Abstract:

In order to find out the serotype, resistant phenotype and genotype of Escherichia coli (E. coli) and Salmonella in piglets, this study collected 128 samples of diarrhea piglets from seven large-scale pig farms in five cities in Guizhou province, and the E. coli and Salmonella were isolated and identified. The pathogenicity of the strain was identified by animal test. The drug resistance of the main pathogen was tested by drug susceptibility paper. The resistance gene of each pathogen was detected by PCR. The drug resistance and genotype correlation of the bacterial were analyzed. The results showed that 78 strains of pathogenic E. coli and 21 strains of Salmonella were isolated and identified in this study. The serotypes of pathogenic E. coli were predominantly O138 and O87. Salmonella Typhimurium and Salmonella Enteritidis were predominant serotypes. The susceptibility test showed that the resistant strains of 78 strains of E. coli were more than 80% resistant to β-lactams and more than 40% for other antibacterials. The resistance rate of 21 strains of Salmonella to aminoglycosides was more than 50% and more than 20% to other types of antibacterials; 12 and 10 kinds of drug resistance-related genes of E. coli and Salmonella were detected, respectively; The coincidence rate of resistant genotype and phenotype of two kinds of bacteria were above 60%, and both were multiple drug resistance. This study provided a theoretical basis for comprehensive prevention and control of piglets diarrhea.

Key words: Escherichia coli; Salmonella; isolation and identification; drug resistance

中图分类号: