奶牛隐性乳房炎的发生规律及致病菌分离鉴定

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

作者对四川省彭水县3个奶牛场的泌乳奶牛群进行了隐性乳房炎的检测及其致病菌的分离鉴定,共检测泌乳牛305头次、1131个乳区,隐性乳房炎的个体阳性率为64.92%,乳区阳性率为32.80%,并且其发生率与管理、挤奶卫生及程序、泌乳期、年龄、胎次等有关。致病菌的总检出率为93.48%,其主要病原菌为金黄色葡萄球菌、无乳链球菌和大肠杆菌,分别占总检出率的37.21%、23.26%和13.95%。

In the essay, all the milk samples from 1131quarters of 305 dairy cattle in three dairies in Pengshui autonomous county were analyzed, and the pathogenic bacteria in the samples were isolated, cultured and identified. The resul showed that, the positive rate of subclinical mastitis took up 64.92%. Quarter positive rate of subclinical mastiffs was 32.80% and the inci dence was connected with management, milking sanitation and program,stage of lactation and age obviously. The main patho- genic bacteria contained Staphylococcus aureuss （93. 48%）, Streptococcus agalactiae （37. 21%） and Escherichia coli （23. 26%）. The gross detectable rate was 13.95%.