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Applied Research Note: Pulsed-field gel electrophoresis and antimicrobial resistance profiles of Campylobacter jejuni isolated from Brazilian broiler farms
Journal of Applied Poultry Research ( IF 1.9 ) Pub Date : 2021-03-23 , DOI: 10.1016/j.japr.2021.100168
C.S.L. Vaz , D. Voss-Rech , L.S. Lopes , V.S. Silva

We studied the on-farm variety of thermotolerant Campylobacter strains isolated from field samples received over a 12-mo period from four broiler-producing companies in southern Brazil. In total, 515 of 807 (63.8%) of analyzed samples were found to be Campylobacter-positive. Campylobacter jejuni and C. coli were detected; the first one being more frequently isolated (98.2%). The highest antimicrobial resistance levels in a subset of 80 C. jejuni strains were found against enrofloxacin (89.5%) and ciprofloxacin (83.3%). Most of the 28 DNA macrorestriction profiles identified in C. jejuni were unique to each sampled broiler company. Genetically related C. jejuni populations were detected on different broiler farms integrated to the same company on different sampling occasions. Undistinguished strains were found in the indoor environment and in broilers on the same farm. The finding of recurrent strains on integrated farms suggests that particular factors or management practices may play a role in the dispersion or carry-over of C. jejuni in the studied broiler companies.



中文翻译:

应用研究注:从巴西肉鸡场分离的空肠弯曲菌的脉冲场凝胶电泳和抗菌素耐药性

我们研究了从巴西南部的四家肉鸡生产公司在12个月内从田间样品中分离出的耐高温弯曲杆菌菌株的农场品种。总共发现807个样本中有515个(63.8%)是弯曲杆菌阳性的。检测到空肠弯曲菌大肠杆菌。第一个被隔离的频率更高(98.2%)。在80个空肠弯曲杆菌菌株中,发现最高的抗药性是对恩诺沙星(89.5%)和环丙沙星(83.3%)的耐药性。空肠弯曲杆菌中鉴定出的28个DNA宏观限制性图谱中的大多数对每个采样的肉鸡公司来说都是唯一的。遗传相关的空肠弯曲菌在不同的采样场合,在整合到同一家公司的不同肉鸡场中检测到种群。在同一个农场的室内环境和肉鸡中发现了无法区分的菌株。在综合养殖场中发现反复出现的菌株表明,在研究的肉鸡公司中,特定因素或管理措施可能对空肠弯曲杆菌的传播或结转起了作用。

更新日期:2021-05-26
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