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为了解通辽地区奶牛隐性乳房炎的发病情况,选取该地区规模化奶牛场、奶牛合作社和散养农户的60头奶牛进行隐性乳房炎的检测。结果表明:通辽地区奶牛隐性乳房炎的发病率为71.67%,乳区阳性率为45.78%;左前、左后、右前和右后四乳区发病率分别为46.67%、48.33%、31.67%和45.00%,乳区发病率之间差异不显著(P>0.05);随着奶牛胎次的提高,奶牛隐性乳腺炎的发病率有上升的趋势(r=0.84);随着奶牛年龄的增大,奶牛隐性乳腺炎的发病率显著提高(P<0.01);奶牛隐性乳腺炎的发病率每增加10个百分点,奶牛产奶量下降约8.89%。
In order to understand the incidence of recessive mastitis in dairy cows in Tongliao Prefecture, 60 dairy cows from large-scale dairy farms, dairy co-operatives and free-range farmers in this area were selected to detect the recessive mastitis. The results showed that the prevalence of recessive mastitis in dairy cattle was 71.67% in Tongliao area and 45.78% in milk area. The incidence rates of the four dairy areas were 46.67%, 48.33% and 31.67% respectively The prevalence of cryptococcal mastitis increased with the increase of cows’ parity (r = 0.84). With the increase of the age of dairy cows The incidence of recessive mastitis in dairy cows increased significantly (P <0.01). The milk yield of dairy cows decreased by about 8.89% for every 10 percentage points increase in the incidence of dairy cow recessive mastitis.