摘要
通过对某奶牛场泌乳牛群隐性乳房炎的调查和分析 ,研究了奶牛隐性乳房炎的发生规律。结果表明 ,该场奶牛隐性乳房炎的阳性率为 31.4 2 %、乳区临诊阳性率达到 10 .6 0 % ;隐性乳房炎的发生随着胎次和泌乳时间的增加而增加 ;左乳区阳性率高于右侧 ,前乳区高于后乳区。在牛群(场 )里进行经常性的临床和实验室检验是必要的。
Investigation and analysis were conducted to study the subclinical mastitis in dairy cows in a farm. The results showed that the incidence of subclinical mastitis in dairy herd were 31.42% and the clinincal positive example in those animals comes to 10.60%. The subclinical mastitis cows increased as the dariy parturient and lactation time increased. The positive rate of subclinical mastitis is higher at the left mammary gland than that of the right one, also,the positive rate of the front mammary gland is higher than that of the back one. The productivity and economic benefit were dropped sharply caused by this chronic disease?It is necessary for the herd to be often checked with clinical and laboratory method.
出处
《湛江海洋大学学报》
CAS
2002年第6期65-68,共4页
Journal of Zhanjiang Ocean University
