机会性病原体的基因组特性Kluyvera揭示了一个新的CTX-M子组
Keyi Yu1, Zhenzhou Huang2, Ruiting Lan3
1National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), State Key Laboratory of Infectious Disease Prevention and Control, Beijing 102206, China.
Microorganisms
|December 23, 2023
概括
克劳维拉细菌是抗生素耐药性基因的重要储存库,包括扩展光谱β-乳酸酶 (ESBL). 这项研究重新分类了这些基因,确定了一组新的亚组 (KLUS),与强烈的抗胺抗性有关.
科学领域:
- 微生物学 微生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 克劳维拉是一种机会性病原体,也是blaCTX-Ms的关键储存体,这些占主导地位的基因编码扩展光谱β-乳酸酶 (ESBL).
- 临床感染的增加强调了了解Kluyvera在抗生素耐药性中的作用的重要性.
- 克劳维拉的遗传灵活性有助于抵抗机制的传播.
研究的目的:
- 为了重建Kluyvera菌株的遗传关系.
- 分析抗微生物敏感性和预测抗生素耐药性基因.
- 为了重新分类blaCTX-Ms子组,并确定新的变异.
主要方法:
- 60个Kluyvera菌株的遗传学分析.
- 抗微生物敏感性测试.
- 预测抗生素耐药性的基因.
- 使用氨基酸变体对blaCTX-Ms的子组重新分类.
主要成果:
- 克莱维拉表现出一个庞大的基因库,具有显著的遗传灵活性.
- 25%的菌株显示ESBL和卡巴胺耐药基因的同时检测.
- 确定了14种新的blaCTX-Ms基因型.
- 一个新的blaCTX-M子组分类确定了10个子组,与遗传学聚类一致.
- 在K. sichuanensis中发现了一种新型的KLUS亚群,它具有强烈的抗素抵抗力.
结论:
- 克莱维拉是blaCTX-Ms的关键储存库,需要加强监测.
- 由于其强大的耐药性表型,拟议的KLUS子组需要进一步关注.
- 更新的blaCTX-M子组分类有助于理解它们的演变和传播.
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