Study on Bovine Mastitis in Dairy Farms of Bahir Dar and its Environs
Study on Bovine Mastitis in Dairy Farms of Bahir Dar and its Environs
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DOI：
10.3923/javaa.2010.2912.2917
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发表时间：
2010-01-01
影响因子：
--
通讯作者：
Tolosa, Tadele
中科院分区：
文献类型：
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作者：
Bitew, Molalegne;Tafere, Arega;Tolosa, Tadele
对302头泌乳奶牛（本地奶牛和杂交奶牛）进行了横断面研究，以确定乳房炎的总体患病率，并使用加利福尼亚乳房炎试验（CMT）作为筛选试验分离和鉴定巴希尔达尔镇及其周围地区涉及的主要细菌病原体。该地区记录的总体乳腺炎患病率为85例（28.2%），其中9例（3%）为临床病例，76例（25.2%）为亚临床病例。在检查的1208个乳区中，23个（1.9%）为盲乳头，134个乳区（12.3%）显示出隐性乳房炎感染的证据。从CMT阳性样品中鉴定出约79株细菌分离株。其中凝固酶阴性葡萄球菌（CNS）占51.9%，金黄色葡萄球菌（20.3%），无乳链球菌（8.8%），牛棒状杆菌（0.75%）和芽孢杆菌（0.75%）。其他分离出的菌种包括停乳链球菌（5.1%）、微球菌属（3.8%）、尿链球菌和化脓放线菌（各2.5%）。乳房炎的发生率差异显著（p
Cross-sectional study was conducted on a total of 302 lactating (local and crossbred) dairy cows to determine the overall prevalence of mastitis and to isolate and identify the predominant bacterial agents involved in Bahir Dar town and its environs using Californian Mastitis Test (CMT) as screening tests. The overall mastitis prevalence recorded in the area was 85 (28.2%), out of which 9 (3%) clinical and 76 (25.2%) were subclinical cases. Of 1 208 quarters examined, 23 (1.9%) were blind teats and 134 quarters (12.3%) showed evidence of infection of sub clinical mastitis. About 79 bacterial isolates were identified from CMT positive samples. Among the isolates were Coagulase Negative Staphylococci (CNS) (51.9%), Staphylococcus aureus (20.3%), Streptococcus agalactiae (8.8%), Corynebacterium bovis (0.75%) and Bacillus species (0.75%). Other species isolated include Streptococcus dysagalactiae (5.1%), Micrococcus species (3.8%), Streptococcus uberis and Actinomyces pyogenes (2.5%) each. The occurrence of mastitis varied significantly (p