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约翰氏病与英国乳牛群生育能力之间的关联
J A Reynolds1, A J Bradley2, V E Sherwin1
1School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington LE12 5RD, UK.
Veterinary journal (London, England : 1997)
|July 21, 2023
概括
咪巴克 (Mycobacterium avium) 亚种结核病 (MAP) 抗体状态影响奶牛的生育能力. 阳性MAP测试结果与受精和受孕率的降低有关,前面的积极诊断有各种各样的影响.
科学领域:
- 兽医免疫学 兽医免疫学
- 乳牛的繁殖 乳牛的繁殖
- 牛的传染病 牛的传染病
背景情况:
- 杆菌 (Mycobacterium avium) 亚种结核病 (MAP) 是乳牛的一个重要病原体.
- MAP感染会影响动物的健康和生产力,包括生殖能力.
- 了解MAP状态和生育率之间的关系对于群体管理至关重要.
研究的目的:
- 量化MAP抗体状况与英国乳牛生育结果之间的关联.
- 调查MAP测试与生殖参数之间的时间关系.
- 提供有关MAP阳性动物的数据,以做出明智的群体管理决策.
主要方法:
- 在78个英国奶牛群中,对121,762次哺乳期的纵向数据进行了回顾性分析.
- 包括牛奶记录,生育能力和MAP抗体ELISA牛奶测试数据.
- 应用多级多变量逻辑回归模型来评估关联.
主要成果:
- 在30-90天内过渡到非阴性MAP测试状态和受精/受孕风险之间观察到负相关性.
- 在90-180天内过渡到非阴性MAP测试状态和输精/受孕风险之间发现了积极的关联.
- 目前的积极MAP状态显示与授精风险有负相关性,与受孕风险有正相关性.
结论:
- 阳性MAP抗体ELISA结果与奶牛生育能力之间存在时间相关性.
- 在阳性MAP抗体ELISA结果之前,人们注意到生育结果的变化.
- 管理决策,例如从MAP阳性奶牛中保留育种,会影响观察到的关联.
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