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首页> 外文期刊>Journal of dairy research >Phylogenetic genotyping, virulence genes and antimicrobial susceptibility of Escherichia coli isolates from cases of bovine mastitis
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Phylogenetic genotyping, virulence genes and antimicrobial susceptibility of Escherichia coli isolates from cases of bovine mastitis

机译：从牛乳腺炎病例中大肠杆菌分离株的系统发育基因分型，毒力基因和抗微生物敏感性

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摘要

The study described in this research communication used phylogenetic genotyping to identify virulence genes and antimicrobial susceptibility in Escherichia coli recovered from cases of bovine mastitis. From 385 mastitic milk samples, 30 (7.8%) isolates were confirmed as E. coli. Most isolates (80%) belonged to phylo-group A. These 30 E. coli isolates were also screened for 11 different virulence genes. The majority of isolates (63%) harbored no virulence gene. Only 11 (37%) isolates tested positive for two virulence genes, either the iron uptake gene iucD in 3 (10%) isolates or the serum resistance gene traT in 2 (7%) isolates or both traT and iucD in 6 (20%) isolates. The E. coli isolates showed highest susceptibility to genta-micin, meropenem, and pipracillin. Most isolates were resistant to ampicillin, cefotaxime and streptomycin. This study suggests that mastitis causing E. coli might originate from com-mensal bacteria and that the presence of these virulence genes, common in extra-intestinal pathogenic E. coli (ExPEC) strains could be attributed to high genetic variability of mas-titis-causing E. coli.
机译：本研究通信中描述的研究使用了系统发育基因分型以识别从牛乳腺炎病例中回收的大肠杆菌中的毒力基因和抗微生物易感性。从385个烟型牛奶样品中，30（7.8％）分离物被证实为大肠杆菌。大多数分离物（80％）属于Phylo-Group A.这30大肠杆菌分离株也被筛选出11种不同的毒力基因。大多数分离株（63％）没有毒力基因。只有11个（37％）的分离物测试两种毒力基因的阳性，在3（10％）分离物中的铁摄取基因IUC或2（7％）分离物或Trat和IUCD中的血清抗性基因Trat在6（20％）中）隔离。大肠杆菌分离株对牙龈麦素，梅洛涅姆和皮坡碧肽的敏感性最高。大多数分离物对氨苄青霉素，头孢噻肟和链霉素抵抗力。该研究表明，导致大肠杆菌可能来自组合细菌的乳腺炎，并且这些毒力基因的存在，常见的肠道致病大肠杆菌（EXPEC）菌株可能归因于MAS-TITIS的高遗传变异性 - 导致大肠杆菌。

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  • 来源
    《Journal of dairy research》 |2021年第1期|78-79|共2页
  • 作者

    Nashmil Aslam; Saeed-UI-Hassan Khan; Tahir Usman; Tariq Ali;

  • 作者单位

    Department of Zoology Quaid-i-Azam University Islamabad Pakistan;

    Department of Zoology Quaid-i-Azam University Islamabad Pakistan;

    China Agricultural University Beijing China College of Veterinary Sciences and Animal Husbandry Abdul Wali Khan University Mardan Pakistan;

    China Agricultural University Beijing China Centre of Microbiology and Biotechnology Veterinary Research Institute Peshawar Pakistan;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Antimicrobial susceptibility; bovine mastitis; E.coli; virulence genes;

    机译：抗微生物易感性;牛乳腺炎;E.coli;毒力基因;

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