全圈养系统中奶牛囊性卵巢的发病率。

Canadian journal of comparative medicine : Revue canadienne de medecine comparee Pub Date : 1985-01-01

A J Hackett, T R Batra

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引用次数: 0

摘要

评估了1061头奶牛在全坐月子状态下1830次产犊后卵巢囊肿的发生率。在三年的时间里，总发病率为14%的哺乳期和22%的奶牛。初产奶牛比多产奶牛更少出现囊性囊肿，分别为5.7%和18%。1979年产犊的发病率(18%)高于1980年(12%)和1981年(13%)，原因不明。不受产犊季节和奶牛遗传系的影响。在研究的最后一年，囊性奶牛的产奶量明显大于非囊性奶牛。

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The incidence of cystic ovaries in dairy cattle housed in a total confinement system.

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.

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Canadian journal of comparative medicine : Revue canadienne de medecine comparee

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