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首页> 美国卫生研究院文献>Antibiotics >Escherichia coli Antibiotic Resistance Patterns from Co-Grazing and Non-Co-Grazing Livestock and Wildlife Species from Two Farms in the Western Cape South Africa
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Escherichia coli Antibiotic Resistance Patterns from Co-Grazing and Non-Co-Grazing Livestock and Wildlife Species from Two Farms in the Western Cape South Africa

机译：大肠杆菌大肠杆菌抗生素抗性模式来自南非西开普省两场农场的共同放牧和非共同牧羊犬和野生动物种类

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Although limited, studies have found conflicting results on whether co-grazing results in significant antibiotic resistance transfer between species. This type of farming system can act as a vector in the geographical spread of antibiotic-resistant bacteria in the environment. The aim of this study was to determine the antibiotic-resistant patterns between co-grazing and non-co-grazing livestock and wildlife species in South Africa. Escherichia coli was isolated from the faeces of various wildlife and livestock species from two farms in South Africa and was tested for antibiotic resistance using the Kirby–Bauer disk diffusion method against chloramphenicol, nalidixic acid, ampicillin, streptomycin, sulphafurazole, and tetracycline. A selection of some common antibiotic-resistant genes (blaCMY, aadA1, sul1, sul2, tetA, and tetB) were detected using PCR. The E. coli isolates from wildlife and livestock that co-grazed showed no significant differences in antibiotic resistance patterns. However, this was not the case for tetracycline resistance as the livestock isolates were significantly more resistant than the co-grazing wildlife isolates. The E. coli isolates from the non-co-grazing livestock and wildlife had significant differences in their antibiotic susceptibility patterns; the wildlife E. coli isolates were significantly more resistant to sulphafurazole and streptomycin than the livestock isolates, whilst those isolated from the cattle were significantly more resistant to ampicillin than the wildlife and sheep isolates. The results of this study suggest that there could be an exchange of antibiotic-resistant bacteria and genes between livestock and wildlife that co-graze.
机译：虽然有限，研究发现了相互放牧是否导致物种之间显着抗生素抗性转移的矛盾的结果。这种类型的农业系统可以充当环境中抗生素抗性细菌的地理扩散的载体。该研究的目的是确定南非共同放牧和非共同放牧的畜牧业和野生动物种类之间的抗生素抗性模式。从南非的两个农场的各种野生动物和家畜种类的粪便中分离出大肠杆菌，并使用Kirby-Bauer盘扩散法对氯霉素，萘啶酸，氨苄青霉素，链霉素，硫磺脲和四环素进行抗生素抗性进行抗生素抗性。使用PCR检测到各种常见的抗生素抗性基因（Blacmy，AADA1，Sul1，Sul 2，Teta和TetB）。共同放牧的野生动物和牲畜的大肠杆菌分离株表明抗生素抗性模式没有显着差异。然而，由于牲畜分离株比共同放牧野生动物分离物显着更具抗性，因此这并非如此。来自非共同放牧畜牧业和野生动物的大肠杆菌分离株在其抗生素易感性模式中具有显着差异;野生动物大肠杆菌分离株比牲畜分离株耐硫唑唑和链霉素显着更耐药，而从牛分离的那些与野生动物和羊分离株显着更耐受氨苄青霉素。本研究的结果表明，在共同放牧的牲畜和野生动物之间，可能存在抗生素抗性细菌和基因的交换。

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