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首页> 外文期刊>The Journal of the South African Veterinary Association >Proactive udder health management in South Africa and monitoring of antibiotic resistance of Staphylococcus aureus in dairy herds from 2001 to 2010
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Proactive udder health management in South Africa and monitoring of antibiotic resistance of Staphylococcus aureus in dairy herds from 2001 to 2010

机译：南非从2001年到2010年积极开展乳房健康管理并监测奶牛群中金黄色葡萄球菌的抗生素耐药性

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Antibiotic resistance of strains of?Staphylococcus aureus?isolated from bovine milk is of concern internationally. The objective of this study was to investigate trends of resistance of?S. aureus?to antibiotics administered to dairy cows in 19 South African and one Zambian dairy herds (participating in the South African proactive udder health management programme) and to identify possible contributing factors. The resistance of?S. aureus?strains to eight commonly used antibiotics in South Africa from 2001 to 2010 was evaluated.?Staphylococcus aureus?isolates (n?= 2532) were selected from cows with subclinical mastitis in 20 herds routinely sampled as part of the proactive udder health management programme. The isolates were selected from milk samples that had somatic cell counts more than 400 000 cells/mL and were tested for antibiotic resistance using a standard Kirby–Bauer test with published clinical breakpoints. The prevalence of antibiotic resistance was evaluated as a percentage of?S. aureus?isolates susceptible out of the total numbers for each antibiotic selected per year.?Staphylococcus aureus?showed a significant increase in percentage of susceptible isolates over time for all antibiotics tested except for ampicillin. The overall prevalence of mastitis did not change during the study period. However, the prevalence of mastitis caused by?S. aureus?(mostly subclinical cases) in the selected herds decreased numerically but not significantly. Reduction in the incidence of antibiotic resistance shown by?S. aureus?was presumed to be a result of the application of the proactive udder health management programme. The fact that the overall prevalence of mastitis was kept stable was possibly because of the influence of the management programme in conjunction with the return of infections caused by non-resistant strains.
机译：从牛乳中分离出的金黄色葡萄球菌菌株的抗药性是国际关注的问题。这项研究的目的是调查抗？S的趋势。在南非的19个奶牛场和赞比亚的1个奶牛场（参加南非积极的乳房健康管理计划）中对抗生素施用金黄色葡萄球菌，并确定可能的影响因素。 S的电阻。在2001年至2010年期间，对南非的8种常用抗生素的金黄色葡萄球菌进行了评估。作为主动性乳房健康管理计划的一部分，从20例具有亚临床乳腺炎的母牛中选择了金黄色葡萄球菌分离株（n = 2532）。 。从体细胞计数超过40万个细胞/ mL的牛奶样品中选择分离株，并使用标准的Kirby-Bauer试验和已公布的临床断点对抗生素的耐药性进行了测试。以ΔS的百分数评估抗生素耐药性的患病率。每年选择的每种抗生素的总数中，金黄色葡萄球菌分离出的易感菌。“金黄色葡萄球菌”显示，除氨苄青霉素外，所有测试的抗生素随时间的推移，其分离菌的百分比均显着增加。在研究期间，乳腺炎的总体患病率没有改变。然而，乳腺炎的流行是由？S引起的。所选畜群中的金黄色葡萄球菌（多数为亚临床病例）数量有所减少，但没有明显减少。 ？S可以降低抗生素耐药性的发生率。推测金黄色葡萄球菌是由于采用了积极主动的乳房健康管理计划而产生的。乳房炎的总体患病率保持稳定的事实可能是由于管理计划的影响以及由非耐药菌株引起的感染的恢复所致。

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