全封闭式饲养系统中奶牛的卵巢囊肿发病率。
The incidence of cystic ovaries in dairy cattle housed in a total confinement system.
作者信息
Hackett A J, Batra T R
出版信息
Can J Comp Med. 1985 Jan;49(1):55-7.
The incidence of cystic ovaries following 1830 calvings of 1061 dairy cows maintained in total confinement was evaluated. The overall incidence was 14% of lactations and 22% of cows during a three year period. Fewer primiparous than multiparous cows became cystic, 5.7% vs 18%, respectively. There was an unexplained higher incidence (18%) among calvings in 1979 than in 1980 (12%) and 1981 (13%). There were no effects due to season of calving or genetic line of cow. During the last year of the study milk production by cystic cows was significantly greater than that by non-cystic cows.
对1061头全封闭饲养的奶牛的1830次产犊后囊性卵巢的发生率进行了评估。在三年期间，总体发生率为泌乳期的14%和奶牛的22%。初产奶牛患囊肿的比例低于经产奶牛，分别为5.7%和18%。1979年的产犊中囊肿发生率（18%）高于1980年（12%）和1981年（13%），原因不明。产犊季节和奶牛的遗传品系没有影响。在研究的最后一年，患囊肿奶牛的产奶量显著高于未患囊肿的奶牛。
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