中国乳业 ›› 2024, Vol. 0 ›› Issue (2): 71-75.doi: 10.12377/1671-4393.24.02.14

• 质量安全 • 上一篇    下一篇

某规模化牧场致犊牛腹泻的大肠杆菌分离鉴定及耐药性检测

曹芳1, 魏勇2, 吴忧1, 赵鹏飞1, 陈钊铭2, 任静静1, 齐亚银1   

  1. 1 石河子大学动物科技学院,新疆石河子 832003;
    2 新疆天润科技股份有限公司,新疆乌鲁木齐 830063
  • 出版日期:2024-02-25 发布日期:2024-03-27
  • 作者简介:曹 芳(1996-),女,山东邹平人,硕士,研究方向为预防兽医学;魏 勇(1980-),男,四川内江人,硕士,高级兽医师,研究方向为奶牛健康养殖;吴 忧(1999-),女,河南平顶山人,硕士,研究方向为预防兽医学;赵鹏飞(2001-),男,河南安阳人,硕士,研究方向为预防兽医学;陈钊铭(1979-),男,新疆阿克苏人,本科,研究方向为奶牛疾病诊断及防控;任静静(1990-),女,河南长垣人,博士,讲师,研究方向为动物细菌性疾病诊断与防治;齐亚银(1980-),男,宁夏固原人,博士,教授,研究方向为预防兽医学。
  • 基金资助:
    奶牛信息智能化管理技术研究与示范(编号:NYHXGG,2023AA310); 石河子大学高层 次人才科研启动项目(编号:RCZK202042)

Isolation,Identification and Drug Resistance Detection of Escherichia coli from Calves Diarrhea in a Large-scale Dairy Farm

CAO Fang1, WEI Yong2, WU You1, ZHAO Pengfei1, CHEN Zhaoming2, REN Jingjing1, QI Yayin1   

  1. 1College of Animal Science and Technology,Shihezi University,Shihezi Xinjiang 832003;
    2Xinjiang Tianrun Technology Co.,Ltd.,Urumqi Xinjiang 830063
  • Online:2024-02-25 Published:2024-03-27

摘要: [目的]为确定引起石河子某规模化牧场犊牛腹泻的主要病原菌及其耐药情况,并针对犊牛腹泻提出合理应对措施,为该牧场防治犊牛腹泻提供参考。[方法]本研究采取现场流行病学检查,无菌采集15 份犊牛腹泻病料,对其进行病原菌分离纯化;通过生化试验以及分子生物学鉴定,确定致犊牛腹泻的病原菌;对病原菌进行药敏试验,确定耐药情况。[结果]经生化试验以及分子生物学鉴定发现,15 份犊牛腹泻病料中,有12 份分离到了大肠杆菌。药敏试验结果显示,13 株大肠杆菌对链霉素耐药率最高为46.15%(6/13),对青霉素、氨苄西林耐药率为38.46%(5/13),且敏感菌株多为中低敏;对四环素敏感性为76.92%(10/13),13 株菌株对头孢噻肟和万古霉素敏感性最高,为84.62%(11/13),多数菌株为多重耐药菌株。[结论]本研究针对腹泻犊牛进行病原菌分离鉴定、药敏试验,为该牧场犊牛腹泻诊治提供参考。

关键词: 犊牛腹泻, 大肠杆菌, 分离鉴定, 耐药性

Abstract: [Objective]To determine the main pathogens causing diarrhea in calves and their antibiotic resistance in a large-scale dairy farm in Shihezi area, and to propose reasonable measures against calf diarrhea, providing a reference for the prevention and treatment of calf diarrhea in the farm. [Methods]This study conducted on-site epidemiological examinations, aseptically collected 15 diarrheal samples from calves, and performed pathogen isolation and purification. The pathogens causing calf diarrhea were identified through biochemical tests and molecular biology identification. Antibiotic sensitivity tests were conducted to determine the drug resistance of the pathogens. [Results]Through biochemical tests and molecular biology identification, Escherichia coli was isolated from 12 out of 15 calf diarrhea samples. The antibiotic sensitivity test results showed that the highest resistance rate of 13 E. coli strains was to streptomycin at 46.15% (6/13), followed by penicillin and ampicillin at 38.46% (5/13), with most sensitive strains being moderately or weakly sensitive; the sensitivity to tetracycline was 76.92% (10/13), and the highest sensitivity among the 13 strains was to ceftiofur and vancomycin at 84.62% (11/13), with most strains being multidrug-resistant. [Conclusion]This study provides a reference for the diagnosis and treatment of calf diarrhea in the farm by conducting pathogen isolation and identification, and antibiotic sensitivity tests on diarrheal calves.

Key words: calves diarrhea, Colibacillus, separation identification, drug resistance

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