畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (10): 5202-5211.doi: 10.11843/j.issn.0366-6964.2025.10.039

• 基础兽医 • 上一篇    下一篇

广东地区鹅源大肠杆菌耐药性分析

余冰瑜1(), 叶一潼1, 陈亦杏1, 张美琳1, 杨智灿1, 陈济铛1, 朱婉君2, 张济培1,*()   

  1. 1. 佛山大学动物科技学院,佛山 528225
    2. 佛山天牧生物科技有限公司,佛山 528225
  • 收稿日期:2025-01-13 出版日期:2025-10-23 发布日期:2025-11-01
  • 通讯作者: 张济培 E-mail:1437354038@qq.com;fszh128@163.com
  • 作者简介:余冰瑜(2001-),女,广东潮州人,硕士生,主要从事水禽疾病防控研究,E-mail: 1437354038@qq.com
  • 基金资助:
    2项专利权及水禽常见病原检测与多发病高效防控技术许可实施合同(BKH20902801);佛山万牧洲生物有限公司技术开发项目(KH23279)

Antimicrobial Resistance Analysis of Escherichia coli from Goose in Guangdong

YU Bingyu1(), YE Yitong1, CHEN Yixing1, ZHANG Meilin1, YANG Zhican1, CHEN Jidang1, ZHU Wanjun2, ZHANG Jipei1,*()   

  1. 1. College of Animal Science and Technology, Foshan University, Foshan 528225, China
    2. Foshan Tianmu Biotechnology Co.Ltd., Foshan 528225, China
  • Received:2025-01-13 Online:2025-10-23 Published:2025-11-01
  • Contact: ZHANG Jipei E-mail:1437354038@qq.com;fszh128@163.com

摘要:

为了解广东地区鹅源大肠杆菌(Escherichia coliE. coli)的药物敏感性、耐药基因的携带情况以及耐药表型与耐药基因的相关性,本试验对2015—2023年分离鉴定的387株鹅源大肠杆菌采用K-B纸片扩散法对25种药物进行药敏试验,采用PCR方法检测19种耐药基因,统计分析分离株的耐药表型及耐药基因型相关性。试验结果显示,分离菌株对多黏菌素B和美罗培南的敏感率最高,耐药率仅为1.29%、1.03%;对部分β-内酰胺类(青霉素、阿莫西林、氨苄西林、头孢拉定、头孢唑林)和四环素类(四环素、多西环素)耐药率高达90%以上;其余大部分药物耐药率处于40%~70%之间。多重耐药统计结果显示:分离菌株的耐药谱高达314种,其中99.22%的分离株表现为2重及以上耐药。耐药基因的检测结果显示:19种耐药基因中tetAaph(3’)-1、sul2、floRqnrSaadA1、blaCTX-M检测率较高,依次分别为89.66%、86.30%、73.64%、73.13%、70.54%、70.03%、60.72%,mcr-1的检测率最低,为5.68%。相关性分析结果显示,耐药基因blaCTX-MblaNDMblaTEMblaOXA、对阿莫西林/克拉维酸的产生具有极显著或显著的相关性(P < 0.01);耐药基因aadA1的携带情况与新霉素、链霉素、大观霉素和安普霉素耐药株的产生具有极显著相关性(P < 0.01);aph(3’)-1的携带情况与新霉素、链霉素、大观霉素和安普霉素耐药株的产生具有极显著相关性(P < 0.01)。本研究为广东地区鹅群防治大肠杆菌病的临床用药方案提供参考。

关键词: 鹅, 大肠杆菌, 药敏试验, 耐药表型, 耐药基因

Abstract:

This study aimed to understand the drug susceptibility, the carriage of resistance genes, and the correlation between resistance phenotypes and genotypes of Escherichia coli (E. coli) from geese in Guangdong. We conducted antimicrobial susceptibility testing on 387 strains of E. coli isolated and identified from 2015 to 2023 using the K-B disk diffusion method for 25 drugs and detected 19 resistance genes using PCR. The correlation between resistance phenotypes and genotypes of the isolated strains was statistically analyzed. The results showed that the sensitivity rate of the isolated strains to polymyxin B and meropenem was the highest, with a resistance rate of only 1.29% and 1.03%, respectively; the resistance rate to someβ-lactams (penicillin, amoxicillin, ampicillin, cefradine, cefazolin) and tetracyclines (tetracycline, doxycycline) reached over 90%; the resistance rate to most other drugs was between 40% and 70%. The results of multiple drug resistance statistics showed that the resistance spectrum of the isolated strains reached 314 types, with 99.22% of the isolated strains exhibiting resistance to two or more drugs. The detection results of resistance genes showed that among the 19 resistance genes, the detection rates of blaCTX-M, aadA1, aph(3′)-1, qnrS, floR, tetA, sul2 were relatively high, at 60.72%, 70.03%, 86.30%, 70.54%, 73.13%, 89.66%, and 73.64%, respectively, while the detection rate of mcr-1 was the lowest, at 5.68%. The results of the correlation analysis indicate that the presence of resistance genes blaCTX-M, blaNDM, blaTEM and blaOXA has an extremely significant or significant correlation with the production of amoxicillin/clavulanic acid (P < 0.01); the carriage of the resistance gene aadA1 has an extremely significant correlation with the production of neomycin, streptomycin, spectinomycin, and apramycin-resistant strains (P < 0.01); the carriage of the resistance gene aph(3')-1 has an extremely significant correlation with the production of neomycin, streptomycin, spectinomycin, and apramycin-resistant strains (P < 0.01). This study provides a reference for the clinical medication program for the prevention and treatment of E. colidisease in geese in Guangdong.

Key words: goose, Escherichia coli, antimicrobial susceptibility testing, drug-resistant phenotype, Drug resistance genes

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