马奇瓦地区(塞尔维亚)西门塔尔牧场临床乳腺炎病例的抗菌药敏感性

M. Ninković, J. Žutić, Marija Pavlović, N. Jezdimirović, O. Radanović, Marko Nikolić, N. Zdravković
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摘要

防治乳腺炎仍是当代畜牧业面临的持久挑战。本文介绍了 2022 年从马奇瓦地区 3 个曾发生过临床乳腺炎的牧场采集的牛奶样本中分离出的细菌病原体的频率。共有 77 头西门塔尔奶牛参加了研究,这些奶牛从第一泌乳期到第六泌乳期不等,均采用绑栏系统管理。研究结果表明,研究对象的临床乳腺炎发病率为 16.9%。在总共 13 个出现临床乳腺炎的病原菌分离物中,金黄色葡萄球菌占 5 个(38.4%),尤伯杯链球菌占 3 个(23.1%),大肠埃希菌占 2 个(15.4%),肺炎克雷伯菌占 2 个(15.4%),痢疾链球菌占 1 个(7.7%)。值得注意的是,冬季记录的临床乳腺炎病例最多(8 例,占 61.5%)。两例由肺炎双球菌引起的乳腺炎都是在夏季发现的,其发生与垫料稻草的变化有关。根据泌乳阶段划分,泌乳初期的乳腺炎发病率最高,共有 8 例(61.5%),其次是泌乳中期的 4 例(30.8%),泌乳后期只有 1 例(7.7%)。在所有病例中,链球菌属的致病菌均对β内酰胺类药物敏感,而所有大肠杆菌和肺炎双球菌分离物均对氨苄西林、阿莫西林和克拉维酸耐药。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Antimicrobial Susceptibility in Clinical Mastitis Cases on Simmental Farms in the Mačva Region (Serbia)
The battle against mastitis remains an enduring challenge in contemporary animal farming. This paper presents the frequency of bacterial pathogens isolated from milk samples collected on 3 farms with a previous history of clinical mastitis in the Mačva region during the year 2022. A total of 77 Simmental cows were enrolled in the study, ranging from the first to sixth lactation and managed in a tie-stall system. The results obtained indicate that the frequency of clinical mastitis in the animals considered was 16.9%. Of a total of 13 pathogenic isolates with clinically present mastitis, Staphylococcus aureus was recorded in 5 (38.4%), Streptococcus uberis in 3 (23.1%), Escherichia coli in 2 (15.4%), Klebsiella pneumoniae in 2 (15.4%), and Streptococcus dysagalactiae in 1 (7.7%). Notably, the largest number of clinical mastitis cases (namely 8, or 61.5%) was recorded during the winter period. Both cases of mastitis caused by K. pneumoniae were detected in the summer, the occurrence of which was implicated in changes in the bedding straw. According to the stage of lactation, the highest frequency of mastitis was found in the early stage of lactation totaling 8 cases (61.5%), followed by 4 (30.8%) in the middle phase of lactation, and only 1 (7.7%) in the late stage of lactation. The causative agents of the Streptococcus genus showed susceptibility to β lactamates in all the cases, whereas all of the E. coli and K. pneumoniae isolates were found resistant to ampicillin, amoxicillin with clavulanic acid.
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