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使用基因组为中心的元基因组学对乳腺微生物组的纵向研究揭示了病原体驱动的适应和继承
Vinicius da Silva Duarte1,2, Fiona Valerie Franklin3, Alicja Krysmann3
1Faculty of Chemistry, Biotechnology and Food Science Norwegian University of Life Sciences (NMBU), Ås, Norway. v.d.s.duarte@ous-research.no.
NPJ biofilms and microbiomes
|December 9, 2025
概括
这项研究跟踪了乳牛在整个哺乳期的乳腺微生物群. 低体细胞计数 (SCC) 与有益细菌相关,而高SCC表明持续感染,为乳腺炎管理提供了洞察力.
科学领域:
- 兽医微生物学 兽医微生物学
- 乳制品科学 乳制品科学
- 动物免疫学 动物免疫学
背景情况:
- 牛乳炎是全球乳制品行业的一个重大挑战.
- 它复杂的病因需要更深入地了解乳腺微生物和免疫学动态.
- 纵向研究对于跟踪哺乳期微生物群变化至关重要.
研究的目的:
- 为了研究挪威红牛整个哺乳周期的乳腺微生物组合和动态.
- 为了将微生物特征与体细胞计数 (SCC) 和哺乳期相关联.
- 确定关键的微生物参与者,包括病原体和有益细菌,以及它们的功能特征.
主要方法:
- 从24只挪威红牛的乳房微生物组进行了纵向采样,跨越了哺乳阶段.
- 身体细胞计数 (SCC) 分析,以评估乳腺炎症.
- 枪式转基因组学和以基因组为中心的分析以表征微生物群落并识别特定菌株.
- 恢复的元基因组组装基因组 (MAGs) 的序列类型,毒性和耐药性概况.
主要成果:
- 身体细胞计数 (SCC) 根据哺乳期有显著的变化,在早期和中期哺乳期是最低的.
- 微生物多样性受到SCC,哺乳期和母牛个体变异性的影响.
- 确定了由金黄色葡萄球菌和S. chromogenes引起的持久性感染.
- 低SCC样本被丰富了有益的品种,如Corynebacterium,Bradyrhizobium和乳球菌.
- 通过元基因组学揭示了病原体特定的代谢特征,有142个MAG的特征.
结论:
- 乳房微生物组组成和SCC在整个哺乳期都是动态的.
- 特定的细菌系与低SCC和潜在的更健康的乳头有关.
- 了解微生物的适应和继承是制定有效的乳腺炎预防和控制策略的关键.
- 这项研究为乳牛群管理的有针对性的干预提供了基础.
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