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亚临床乳腺炎发生率与两种不同的自动奶制系统中病原体患病率之间的关系
Karise Fernanda Nogara1, Marcos Busanello1, Maity Zopollatto1
1Department of Animal Science, Federal University of Paraná, Curitiba 80035-050, PR, Brazil.
Animals : an open access journal from MDPI
|March 28, 2025
概括
自动挤奶系统 (AMS) 对亚临床乳腺炎 (SCM) 有影响. 与DeLaval相比,Lely AMS显示了较高的SCM发生率和与主要病原体的关联,这表明清洁系统的差异影响了感染动态.
科学领域:
- 兽医医学 兽医医学 兽医医学
- 动物科学动物科学
- 乳制品科学 乳制品科学
背景情况:
- 亚临床乳腺炎 (SCM) 是乳牛群的一个重大问题,影响牛奶质量和动物福利.
- 自动挤奶系统 (AMS) 越来越多地被采用,但它们对SCM流行病学和病原体流行率的影响需要进一步调查.
- 在AMS中的乳房清洁方法可能在病原体传播和SCM发展中发挥关键作用.
研究的目的:
- 为了比较亚临床乳腺炎 (SCM) 的流行病学指数和两种不同的自动挤奶系统 (AMS) 之间引起乳腺炎的病原体的流行率.
- 评估AMS中的特定乳头清洁机制与乳牛中SCM和特定病原体的发生之间的关联.
主要方法:
- 进行了一项比较研究,对464头哺乳期奶牛进行了比较,这些奶牛在三年 (2020-2023) 期间被安置在堆肥床包仓 (CBPBs) 中.
- 分析了来自八个AMS单位的数据 (四个DeLaval与乳头杯清洁,四个Lely与刷子清洁).
- 用体细胞计数 (SCC) 和微生物培养来评估亚临床乳腺炎;统计分析包括威尔科克森标记级和奇方测试.
主要成果:
- 德拉瓦尔和莱利AMS之间在SCM流行,慢性或治愈的奶牛百分比,体细胞计数 (SCC) 或总细菌计数 (TBC) 中没有发现显著差异.
- 然而,SCM的发病率在莱利AMS (14.7%) 与德拉瓦尔AMS (9.1%) (p=0.0032) 相比显著更高.
- 莱利AMS与主要病原体 (金黄色葡萄球菌,大肠杆菌) 有关,而德拉瓦尔AMS与轻微的环境和传染病原体 (非金黄色葡萄球菌) 有关.
结论:
- 一个AMS的乳头清洁系统与导致乳腺炎的病原体的传播有关.
- 使用刷子清洁乳头的莱利AMS可能与SCM的更高发病率和更具攻击性的病原体的流行有关.
- 对AMS乳头清洁技术的进一步研究是有必要的,以优化乳头健康并尽量减少乳牛群中的SCM.
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