摩根氏菌的全球植物地理和抗生素耐药性特征:一项流行病学,空间,比较基因组研究
概括
摩根氏菌 (Morganella morganii) 是一种机会性病原体,其全球流行率越来越高. 这项研究重新分类了其物种并追踪了抗菌素耐药性基因 (ARG),揭示了显著的多样性和传播,需要持续监测.
科学领域:
- 微生物学和进化基因组学
- 抗微生物耐药性 (AMR) 研究研究
- 传染病流行病学 传染病流行病学
背景情况:
- 摩根氏菌 (Morganella morganii) 是一种全球普遍存在的机会性病原体,其进化动态和抗菌素耐药性基因 (ARG) 的出现不明.
- 追踪M. morganii的全球分布和基因组特征对于了解其传播和抵抗模式至关重要.
研究的目的:
- 为了确定全球分布,基因组分类和摩根氏菌的分类.
- 在全球范围内监测摩根氏菌分离体抗微生物耐药性的纵向变化.
- 研究ARG与移动遗传元素之间的关联.
主要方法:
- 分析了来自49个国家的1027个非重复的摩根氏菌基因组,涵盖了1900年至2024年.
- 基因组分类使用平均核酸标识 (ANI) 距离和核心基因组基因组.
- 多位置序列类型化 (cgMLST) 用于遗传集群和贝叶斯进化分析用于传播途径.
- 对抗微生物耐药性基因 (ARG) 和移动遗传元素的识别和相关性分析.
主要成果:
- 摩根氏菌被重新分类为六个物种:M. morganii,M. sibonii,M. chanii,M. laugraudii,M. kristinii和M.心理耐受.
- 通过cgMLST识别的87个遗传集群和737个单一菌株观察到高度的遗传多样性.
- 总共有195种ARG被检测到,它们对氨基糖化物,β-乳糖胺,氨基醇,硫胺和四环素具有常见的耐药性. 在22个国家发现了21个碳烯酶基因.
- 在ARG和移动遗传元素之间发现了显著的正相关性,表明ARG动员.
结论:
- 摩根氏菌分离物呈现出越来越高的耐药性和感染率,需要进行分类学重新分类.
- 持续全球监测摩根拉的抗体和进化动态是必不可少的.
- 了解移动遗传元素的ARG动员是对抗抗性传播的关键.
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