奶牛隐性乳房炎链球菌的分离鉴定及药敏试验

摘要

The pathogenic bacteria separated from fresh milk in the Mengzi area of Yunnan Province were morphologically and biochemically identified via bacterial culture,and their susceptibilities to 7 common antibiot-ics were also tested.The results showed that the 7 separated streptococcus strains (MZ1—MZ7)were respectively 2 strains of Streptococcus agalactiae (MZ1 and MZ6),3 strains of S.uberis (MZ4,MZ5 and MZ7)and 2 strains of S.dysgalactive (MZ2 and MZ3)according to traditional morphology,physiology and biochemistry as well as The Common Manual ofDeterminative Bacteriology;All the above strains were susceptible to tetracycline,cefoxitin, ciprofloxacin and oxacillin,but low susceptible to gentamicin,vancomycin and penicillin.%从云南省蒙自地区奶牛乳样中采集病原菌，通过细菌培养，进行形态和生化试验鉴定及药敏试验。结果表明：从牛奶中分离得到的7株链球菌（编号为 MZ1—MZ7），按照传统的形态学和生理生化并参照《常见细菌系统鉴定手册》，2株是无乳链球菌（Streptococcus agalactiae）（MZ1和 MZ6）、3株是乳房链球菌（S．uberis）（MZ4、MZ5和 MZ7）和2株停乳链球菌（S．dysgalactive）（MZ2和 MZ3）；这些菌株对四环素、头孢噻吩、环丙沙星和苯唑西林4种药物敏感，对庆大霉素、万古霉素和青霉素3种药物敏感性较低。