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在动物群体中,黄金葡萄球菌的菌体驱动的出现和扩散

Gonzalo Yebra¹, Daniel Mrochen², Stefan Fischer³

¹The Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom.

|July 24, 2024

概括

金黄色葡萄球菌已经适应感染动物,其中一些菌株起源于人类群体,并通过研究小鼠在全球传播. 在野生动物中发现的其他菌株是欧洲独有的,携带用于宿主适应的特定基因.

科学领域:

微生物学微生物学
进化生物学进化生物学
基因组学就是基因组学.

背景情况:

*金黄色葡萄球菌 (Staphylococcus aureus) 是一种影响人类健康和经济的重要病原体.
*最近的发现表明,黄金杆菌殖民并感染了动物,这引发了关于其起源和动物感染潜力的疑问.

研究的目的:

* 调查黄金葡萄球菌在动物中的进化史和起源.
* 了解与动物相关的黄金菌的动物感染潜力和宿主特异性适应性.

主要方法:

*分析了1249个金黄色葡萄球菌基因组序列,包括393个来自动物和小哺乳动物的分离物.
* 采用了植物地理分析来追踪特定血统的传播.
* 进行了全基因组关联研究以确定分子适应.

主要成果:

* 在实验室小鼠中发现了广泛传播的人类起源的S. aureus克隆,其中一个系 (CC88) 在20世纪80年代在北美出现,并通过研究小鼠在全球传播.
* 在欧洲各地的野生动物中发现了独特的金黄色细菌血统.
*揭示了动物S. aureus中独特的细菌菌体和病原性岛屿,使动物血凝固,并增强腹形成和持久性.

结论:

*金黄色葡萄球菌具有显著的适应新宿主物种的能力,包括动物.
* 基因获取,特别是新型的prophages和病原性岛屿,对于S. aureus在动物宿主中的生存和适应至关重要.
* 这项研究强调了病原体进化和宿主交换事件的动态性质.

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