摘要
对１０２例临床型和１８７例隐性型乳房炎病例的奶样进行了细菌学分析。临床型病例中，８５．３％的乳样检出了细菌，检出率高于隐性乳房炎病例（７２．２％）。传染性病原，包括无乳链球菌（Ｓｔｒｅｐｔｏｃｏｃｃｕｓａｇａｌａｃｔｉａｅ），金黄色葡萄球菌（Ｓｔａｐｈｙｌｏｃｏｃｃｕｓａｕｒｅｕｓ）和牛棒状杆菌（Ｃｏｒｙｎｅｂａｃｔｅｒｉｕｍｂｏｖｉｓ），在临床型病例中的检出率是４１．２％，隐性型病例中的检出率是３９．５％，是检出率最高的一类致病菌。临床型乳房炎的另一类重要致病菌是环境性细菌。本研究检出的这类致病菌有乳房链球菌（Ｓｔｒｅｐｔｏｃｏｃｃｕｓｕｂｅｒｉｓ），粪链球菌（Ｓｔｒｅｐｔｏｃｏｃｃｕｓｆａｅｃａｌｉｓ），牛链球菌（Ｓｔｒｅｐｔｏｃｏｃｃｕｓｂｏｖｉｓ），埃希氏大肠杆菌（Ｅｓｃｈｅｒｉｃｈｉａｃｏｌｉ）和变形杆菌（Ｐｒｏｔｅｕｓｓｐｐ．），检出率是２０．６％，而隐性乳房炎中的检出率只有２．２％。凝固酶阴性的葡萄球菌（Ｃｏａｇｕｌａｓｅ－ｎｅｇａｔｉｖｅｓｔａｐｈｙｌｏｃｏｃｃｉ，ＣＮＳ）在两类乳房炎中的检出率分别是１４．７％和１３．４％。此外还检出了一些乳区有两种或两种以上的细菌混合感染。
Bacteriological analysis was carried out based on the quarter milk samples from 102 clinical and 187 subclinical mastitis casesFrom clinical cases,853% of the samples were detected to have bacteria,which were significantly more than those form the subclinical cases (722%)Contagious pathogens,including Streptococcus agalactiae,Staphylococcus aureus and Corynebacterium bovis,accounted for the major part of the detected pathogens in the clinical (412%) as well as in the subclinical cases (395%) Enviromental pathogens were the secondary important bacteria for the clinical cases in this study,in which Streptococcus uberis,Streptococcus faecalis,Streptococcus bovis,Protrusspp and Escherichia coli were isolated.Significantly more quarters (206%) were found to have enviromental bacteria infection in the clinical cases compared to the subclinical cases (22%)The detective rates of Coagulasenegative staphylococci in the clinical and subclinical groups were 147% and 134%,respectivelyIn addition,the quarters infected with two or more than two types of bacteria were observed
基金
国家自然科学基金
关键词
奶牛
乳房炎
细菌学
乳牛
Dairy cattle Mastitis Pathogenic bacteria
