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在料,床材和散装牛奶中的微生物群落:来自养试验的经验
T Eliasson1, L Sun2, Å Lundh2
1Department of Molecular Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden; Norrmejerier, SE-901 23 Umeå, Sweden.
Journal of dairy science
|July 27, 2024
概括
奶牛是一个乳牛.
科学领域:
- 乳制品科学 乳制品科学
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
背景情况:
- 乳制品价值链中的微生物群越来越引起人们的兴趣.
- 了解影响生奶微生物群的因素对于控制细菌存在至关重要.
- 环境,料和管理因素影响牛奶微生物群.
研究的目的:
- 在瑞典一个奶牛场探索料,床材和牛奶中的微生物群.
- 调查不同料对整个乳制品价值链中的细菌成分的影响.
- 为了评估细菌从料转移到牛奶在不同的结处理.
主要方法:
- 评估了3种化处理 (没有添加剂,酸处理,初始培养疫苗接种).
- 在3周的时间里,向67头奶牛提供部分混合食.
- 使用主坐标分析 (PCoA) 和加权的UniFrac距离分析细菌组成.
主要成果:
- 细菌数量最高的是在床材中 (9.6 log10 cfu/g),最低的是在牛奶中 (3.5 log10 cfu/g).
- 微生物群群的明确分离:杂草,料/部分混合配给,床上用品/牛奶.
- 观察到细菌从料转移到床铺,但很少转移到牛奶;牛奶微生物群类似于床铺材料.
结论:
- 化处理并没有显著澄清化微生物群的影响.
- 低细菌转移到牛奶表明环境污染或卫生措施影响了结果.
- 牛奶微生物群的组成更多地受到床材的影响,而不是料处理.
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