Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (10): 5202-5211.doi: 10.11843/j.issn.0366-6964.2025.10.039

• Basic Veterinary Medicine • Previous Articles     Next Articles

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

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

CLC Number: