对四川奶牛隐性乳房炎的调查研究

Investigation of the recessive mastitis on dairy farms

本文采用美国加利福尼亚快速诊断法(CMT法)对四川四家大型奶牛场(A、B、C、D)96头泌乳奶牛的360个乳区进行隐性乳房炎的检测,对患隐性乳房炎的奶牛及其乳区的阳性率进行了样本百分数差异显著性检验,并对患隐性乳房炎奶牛的胎次、日产奶量、年龄与发生率的关系进行了相关性检验。结果得出:被检奶牛隐性乳房炎的头发生率为25%,乳区发生率为9.17%;奶牛隐性乳房炎发生率和泌乳奶牛年龄、胎次呈显著正相关,奶牛隐性乳房炎发生率对日产奶量也有显著影响。

In order to provide some reference basis of recessive mastitis in sichuan on diagnosis prevent and cure and reduce economy loss, three hundred and sixty mamma regions of 96 lactating cows were examined on four dairy farms （A.B.C.D） in Sichuan to detect the cows with recessive mastitis. The result showed that 25.00 percent （24/96） of the dairy cows and 9.17 percent （33/360） of the mamma regions of the dairy cows had got positive reaction. The connection of the recessive mastitis with milk production, dairy cow＇s ages, environment and raising were dissimilarity.