在哺乳乳乳母奶牛中,牛奶抗黄球菌抗体,体细胞计数和牛奶产量之间的关联
S McDougall1,2, R Koralagamage Don3, A Pernthaner3
1Tāwharau Ora - School of Veterinary Science, Massey University, Palmerston North, New Zealand.
New Zealand veterinary journal
|February 5, 2026
概括
这项研究发现,Staphylococcus aureus的IgG ELISA的样本/阳性 (S/P) 比率与体细胞计数 (SCC) 适度一致,并且与老牛乳固体 (MS) 减少有关.
科学领域:
- 兽医免疫学 兽医免疫学
- 乳制品科学 乳制品科学
- 动物健康 动物健康
背景情况:
- 牛乳炎通常是由金黄色葡萄球菌引起的,影响牛奶的生产和质量.
- 身体细胞计数 (SCC) 是乳内感染的标准指标.
- 针对S. aureus的IgG ELISA具有潜在的诊断工具,但其与已知标记物的相关性需要评估.
研究的目的:
- 为了评估来自S. aureus特异性牛奶IgG ELISA和奶牛SCC的S/P比率之间的关联.
- 评估S/P比率与牛奶固体 (MS) 生产之间的关系.
- 为了调查这些协会在一个基于牧场的新西兰乳牛群.
主要方法:
- 从常规群体检测中对牛复合乳样本进行了回顾性分析.
- 使用牛奶IgG ELISA测量黄金菌和SCC的测量.
- 采用了通用线性混合模型和Gwet的协议系数 (AC) 来分析数据.
主要成果:
- 在S/P比率和SCC分类之间观察到适度的一致性 (Gwet的AC=0.59).
- S/P比率因哺乳期的月份而异,因年龄和品种的相互作用而异.
- 与测试负的奶牛相比,被归类为S/P测试阳性的老奶牛的MS产量较低.
结论:
- 黄金菌特异性IgG ELISA的S/P比率是一个有效的指标,显示了与SCC的中度一致.
- S/P比率与乳产量下降有关,特别是在老奶牛和晚期哺乳期.
- 建议进行进一步的研究,包括微生物学和长期群体生存,以提高测试的实用性.
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