湖北农业科学 ›› 2026, Vol. 65 ›› Issue (10): 196-201.doi: 10.14088/j.cnki.issn0439-8114.2026.10.028

• 畜牧·兽医 • 上一篇    下一篇

山南市羊源大肠杆菌的分离鉴定及生物学特性

巴桑1, 扎西占堆1, 巴桑罗布1, 管宁宁2, 陈景瑞1, 杨克礼2   

  1. 1.山南市畜牧兽医总站/山南市动物疫病预防控制中心,西藏 山南 856000;
    2.湖北省农业科学院畜牧兽医研究所/农业农村部畜禽细菌病防治制剂创制重点实验室/畜禽病原微生物学湖北省重点实验室,武汉 430064
  • 收稿日期:2026-05-15 出版日期:2026-10-25 发布日期:2026-10-23
  • 通讯作者: 陈景瑞(1986-),男,高级兽医师,主要从事畜禽疫病防控技术研究。
  • 作者简介:巴 桑(1984-),男(藏族),西藏山南人,高级畜牧师,主要从事畜禽养殖及畜禽疫病防控技术研究,(电子信箱)snxmsy@163.com;杨克礼(1976-),男,副研究员,主要从事家畜疫病防控技术研究,(电话)13659806528(电子信箱)hbxmssys@163.com
  • 基金资助:
    山南市科技计划项目(SNSBJKJJHXM2025009)

Isolation, identification and biological characterization of Escherichia coli isolated from goats in Shannan City

Basang1, Zhaxi Zhandui1, Basang Luobu1, GUAN Ning-ning2, CHEN Jing-rui1, YANG Ke-li2   

  1. 1. Shannan Municipal Animal Husbandry and Veterinary Station/Shannan Animal Epidemic Prevention and Control Center, Shannan 856000, Xizang,China;
    2. Institute of Animal Sciences and Veterinary Medicine, Hubei Academy of Agricultural Sciences/Key Laboratory of Prevention and Control Agents for Animal Bacteriosis, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Pathogenic Microbiology of Hubei Province, Wuhan 430064, China
  • Received:2026-05-15 Published:2026-10-25 Online:2026-10-23

摘要: 为了解西藏自治区山南市腹泻羊中大肠杆菌流行情况及其生物学特性,对山南市腹泻病羊的粪便及肠组织样本进行细菌分离与鉴定,并对其毒力基因和药物敏感性进行检测。结果表明,在麦康凯培养基上长出具有大肠杆菌特征的菌落,经16S rDNA基因PCR鉴定,自肠组织和粪便中分离得到2株致病性大肠杆菌。采用PCR检测分离菌的毒力基因,表明分离菌株均携带phoA、FimC毒力基因。致病性试验结果显示,腹腔注射2×106 CFU/mL分离菌株感染小鼠,感染组小鼠在7 d内全部死亡。药物敏感性结果表明,粪便分离菌株对阿莫西林、青霉素G、磺胺甲唑和林可霉素等4种药物耐药,肠组织分离菌株对青霉素G、头孢噻肟、头孢他啶、红霉素、磺胺甲唑和林可霉素等6种药物耐药。

关键词: 羊, 大肠杆菌(Escherichia coli), 分离鉴定, 毒力基因, 耐药性

Abstract: In order to investigate the prevalence and biological characteristics of Escherichia coli in diarrhea cases of goats in Shannan City, Xizang Autonomous Region. Bacterial isolation and culture techniques, combined with molecular biological methods, were employed to isolate and identify Escherichia coli strains from fecal samples and intestinal tissue specimens obtained from diarrheic goats in Shannan City. Additionally, the isolated strains’ virulence gene profile and antimicrobial susceptibility were systematically characterized. The results showed that colonies with the characteristics of Escherichia coli were grown in MacConkey agar medium. Further PCR identification confirmed the isolation of 2 pathogenic Escherichia coli strains. The virulence genes of the isolates were detected by PCR, and the virulence genes phoA and FimC were detected. Pathogenicity testing revealed that intraperitoneal inoculation of mice with 2×106 CFU/mL of the isolated strain resulted in 100% mortality in the infected group by day 7. The drug sensitivity testing revealed that the fecal isolated strain exhibited resistance to amoxicillin, penicillin G, sulfamethoxazole, and lincomycin, while the intestinal isolated strain exhibited resistance to six antimicrobial agents: penicillin G, cefotaxime, ceftazidime, erythromycin, sulfamethoxazole and lincomycin.

Key words: goat, Escherichia coli, isolation and identification, virulence gene, antimicrobial resistance

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