中国畜牧兽医 ›› 2020, Vol. 47 ›› Issue (3): 931-939.doi: 10.16431/j.cnki.1671-7236.2020.03.033

• 基础兽医 • 上一篇    下一篇

肉鸡养殖场中耐药相关基因散播情况的调查研究

陈霞1, 车洁1, 骆鹏杰2, 张云飞1, 赵晓菲1, 袁敏1, 白雪梅1, 李文革1, 李娟1   

  1. 1. 中国疾病预防控制中心传染病预防控制所, 传染病预防控制国家重点实验室, 感染性疾病诊治协同创新中心, 北京 102206;
    2. 国家食品安全风险评估中心, 北京 100022
  • 收稿日期:2019-09-24 出版日期:2020-03-20 发布日期:2020-03-17
  • 通讯作者: 李娟 E-mail:lijuan@icdc.cn
  • 作者简介:陈霞(1983-),女,天津人,博士,研究方向:细菌耐药性,E-mail:chenxia@icdc.cn
  • 基金资助:
    "十三五"国家科技重大专项"病原菌耐药性检测、监测关键技术及传播规律研究"(2018XZ10733-402);国家自然科学基金"肉鸡养殖场中ISCR1元件及其相关耐药基因的扩散风险研究"(31502124)

Investigation on the Spread of Resistance-related Genes in Broiler Farms

CHEN Xia1, CHE Jie1, LUO Pengjie2, ZHANG Yunfei1, ZHAO Xiaofei1, YUAN Min1, BAI Xuemei1, LI Wenge1, LI Juan1   

  1. 1. State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China;
    2. China National Center for Food Safety Risk Assessment, Beijing 100022, China
  • Received:2019-09-24 Online:2020-03-20 Published:2020-03-17

摘要: 为研究耐药相关基因在肉鸡养殖场中的分布流行情况,本研究以河北省肉鸡养殖场待出栏肉鸡为研究对象,采用随机抽样方式采集肉鸡泄殖腔拭子样品264份,粪便污染地面样品9份,进行blaNDMblaOXAblaCTX-MarmA、fexA、cfrmcr-1、qnrS 8种耐药基因和int1、ISCR1 2种与耐药基因散布密切相关基因的实时荧光定量PCR检测。结果显示,10种基因在273份样品中均有不同程度检出,检出率在4.03%~97.07%之间,检出率最低的为armA基因,最高的为int1基因;样品中有基因共存情况,并以3种耐药基因共存的情况最多,有4份样品存在1种耐药基因,6份样品未检出任何耐药基因,没有样品共存8种耐药基因;通过数据分析,共得到41种不同的耐药基因谱型,其中常见的耐药基因谱型为blaCTX-M-fexA-mcr-1和blaOXA-blaCTX-M-fexA-cfr-mcr-1-qnrS;分析发现样品携带两种及以上耐药基因时,与耐药基因散布相关的int1和ISCR1元件检出率越高,耐药基因在样品中检出的种类越多;耐药基因blaOXAblaCTX-MfexA、cfrmcr-1、qnrS与int1基因的共存有统计学意义(P<0.05);耐药基因blaNDMblaOXAblaCTX-MfexA、cfrqnrS与ISCR1元件的共存有统计学意义(P<0.05)。本研究为畜牧兽医养殖行业耐药性监测工作提供了基于样品的新型实时荧光定量PCR检测方法,为有效预防耐药菌、耐药基因产生、控制耐药性的快速传播提供了可靠的数据支持。

关键词: 肉鸡; 耐药基因; 基因散播; 相关性

Abstract: To investigate resistance genes and their spread related genes in broilers,totally 273 broiler fecal samples were collected by random sampling from two broiler farms in Hebei province.A total of eight kinds of resistance genes and two kinds of spread related genes including blaNDM,blaOXA,blaCTX-M,armA,fexA,cfr,mcr-1,qnrS,and int1,ISCR1 which closely related to the spread of resistance gene,were detected by Real-time PCR,respectively.According to the results,all of the genes were existed in the colaca swab samples with positive rate 4.03%-97.07%.The aminoglycoside-resistance gene,armA,showed the lowest positive rate,and resistance gene spread related gene,int1,showed the highest positive rate.More than two (including two) kinds of resistance genes were detected in 273 of samples.Three kinds of resistance genes co-existing was the most common.Four samples harbored only one resistance gene,and six harbored none.No sample harbored eight kinds of resistance genes.There were 41 resistance gene type profiles through data analysis.The common resistance gene type profiles included blaCTX-M-fexA-mcr-1 and blaOXA-blaCTX-M-fexA-cfr-mcr-1-qnrS.Based on statistics analysis,the more resistance genes detected,the higher int1/ISCR1 gene positive rate exhibited in samples which carried more than two (including two) kinds of resistance genes.The coexistence of resistance genes blaOXA,blaCTX-M,fexA,cfr,mcr-1,qnrS with int1 gene showed statistical significance (P<0.05),respectively.And,the coexistence of resistance genes blaNDM,blaOXA,blaCTX-M,fexA,cfr,mcr-1,qnrS with ISCR1 gene showed statistical significance (P<0.05),respectively.This study provided new Real-time PCR methods for drug resistance surveillance of animal husbandry and veterinary realms,and gave data support to drug resistance prevention and control in future.

Key words: broiler; resistance gene; gene spread; relationship

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