追踪Morganella morganii可能的进化趋势:从分子流行病学和遗传学分析的见解
Jiawei Chen1,2, Yun Wu1,2, Ge Zhang1
1Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
mSystems
|June 17, 2024
概括
摩根氏菌 (Morganella morganii) 的进化是由移动遗传元素驱动的,增强了其适应抗菌剂和环境变化的适应能力. 这项研究确定了新的基因物种和富含耐药性和毒性基因的序列集群.
科学领域:
- 基因组学和进化生物学
- 微生物学与传染病的研究
背景情况:
- 摩根氏菌 (Morganella morganii) 是一种重要的机会性病原体,以其固有的抗菌素耐药性而闻名.
- 尽管M. morganii具有临床重要性,但对其进化动态的研究有限.
研究的目的:
- 为了研究 Morganella morganii 的进化动态和基因组多样性.
- 在M. morganii分离物中识别抗微生物耐药性基因 (ARG) 和病毒性相关基因 (VRG).
- 探索移动遗传元素 (MGE) 在M. morganii. 适应中的作用.
主要方法:
- 对431个M. morganii分离物的基因组序列分析 (206个临床,225个公共).
- 识别ARG,VRG和移动遗传元素 (MGE).
- 遗传学分析和基因物种划分.
主要成果:
- 确定了各种ARG (例如mcr-1,tet(X4),blaKPC-2) 和一种新的结合性blaKPC-2等离子体.
- 发现了三种新型基因物种 (M. chanii,M. variant1,M. variant2) 和12个序列集群 (SC).
- SC9显示了ARG,VRG和MGE的丰富,表明适应抗微生物选择性压力.
结论:
- 莫尔加尼菌的进化受到MGEs的显著影响,增强了它的适应性.
- 新的基因物种和序列集群突出显示了M. morganii.正在进行的进化适应.
- 这些发现对于监测流行病学和了解这种病原体的演变至关重要.
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