奶牛隐性乳房炎的流行病学调查及病原菌的分离鉴定

Epidemiologic Survey and Isolation and Identification of Pathogenic Bacteria of Bovine Subclinical Mastitis

对某大型奶牛场进行隐性乳房炎的流行病学调查,以及致病菌的分离鉴定,结果得出:对同一牛舍76头泌乳牛进行CMT检测,其中隐性乳房炎的牛发病率为68.42%(52/76),在278个有效乳区中,隐性乳房炎的乳区有109个,乳区阳性率为39.21%(109/278),从10份被检乳汁中共分离出59株细菌,经生化鉴定其主要致病菌为金黄色葡萄球菌、无乳链球菌和大肠杆菌,分别占总数的18.64%。

The intension of this study is to find out the leading pathogens causing bovine subclinical mastitis, and Isolation and Identification of Pathogenic Bacteria, As the investigation showed： The cow infection rate of subclinical mastitis is 68.42% （52/76）. There were 109 breast zone of subclinical mastitis in 278 utility breast zone, the positive infection rate of breast zone is 39.21% （109/278）. 59 bacterial strains were isolated from 10 milk samples of subclinical mastitis.The leading pathogens are Staphylococcus aureus, Streptococcus agalactiae and Escherichia coli, which account for 18.64% of total respectively.