重庆地区奶牛隐性乳房炎的调查

采用CMT检测法，对重庆地区146头泌乳奶牛进行隐性乳房炎检测，并对部分阳性牛进行致病菌的分离鉴定及药敏试验。结果显示：146头泌乳奶牛隐性乳房炎感染率为79．62％，泌乳乳区阳性率为56．31％(574个乳区)；致病菌检出率75％；金黄色葡萄球菌和沙门氏菌分别占509，6和25％；致病菌对一些不常用的药物敏感性较好，而常用的药物抑菌效果较差。

The Investigation of Hidden Mastitis in Cow in Chongqing

146 lactating dairy cattle in Chongqing had been detected by CMT method to determine the incidence of hidden mastitis, pathogen were also isolated from the milk and identified, then pharmacosen-sitive test was carried out. it was found that positive incidence of hidden mastitis was 79. 62%, udder region positive incidence 56. 31%, pathogen positive incidence 75% . The positive incidence of S. aureus and Salmonella were 50%, 25% respectively. The pathogen were more sensitive to uncommon antibiotics, but the therapy of antibiotics, which were common used, was not very good.