从伊朗沙赫鲁德地区奶牛乳腺炎乳汁中分离出的无乳链球菌的生物膜形成、溶血素产生及抗菌药敏性
Biofilm formation, hemolysin production and antimicrobial susceptibilities of Streptococcus agalactiae isolated from the mastitis milk of dairy cows in Shahrekord district, Iran.
作者信息
Ebrahimi Azizollah, Moatamedi Azar, Lotfalian Sharareh, Mirshokraei Pejhman
机构信息
Department of Pathobiology, School of Veterinary Science, Shahrekord University, Shahrekord, Iran;
DVM student School of Veterinary Science, Shahrekord University;
出版信息
Vet Res Forum. 2013 Fall;4(4):269-72.
Abstract
Streptococcus agalactiae is a major contagious pathogen causing bovine sub-clinical mastitis. The present investigation was carried out to determine some phenotypic characteristics of the S. agalactiae strains isolated from bovine mastitis cases in dairy cows of Shahrekord in the west-center of Iran. One hundred eighty California mastitis test (CMT) positive milk samples were bacteriologically studied. A total of 31 (17.2%) S. agalactiae isolated. Twenty eight (90.3%) of the isolates were biofilm producers. This finding may indicate the high potential of pathogenicity in isolated strains. Sixteen (51.6%) isolates were α hemolysin producers. Only 19.3%, 22.5% and 29.0% of the isolates were sensitive to streptomycin, flumequine and kanamycin, respectively. None of these three agents is recommended for treatment of mastitis cases.
摘要
无乳链球菌是引起奶牛亚临床型乳腺炎的主要传染性病原菌。本研究旨在确定从伊朗中西部沙赫雷克德奶牛乳腺炎病例中分离出的无乳链球菌菌株的一些表型特征。对180份加利福尼亚乳腺炎检测（CMT）呈阳性的牛奶样本进行了细菌学研究。共分离出31株（17.2%）无乳链球菌。其中28株（90.3%）分离株可产生生物膜。这一发现可能表明分离菌株具有很高的致病潜力。16株（51.6%）分离株可产生α溶血素。这些分离株中分别只有19.3%、22.5%和29.0%对链霉素、氟甲喹和卡那霉素敏感。这三种药物均不推荐用于治疗乳腺炎病例。
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