在临床ST91Citrobacter freundii分离物中,结合性IncFII/IncR等离子体的表征,该等离子体含有BlaKPC-2
Xiao Liu1, Zhen Liu2, Zhiwen Sun1
1National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China.
BMC microbiology
|February 4, 2026
概括
这项研究确定了第一个携带blaKPC-2的IncFII(pBK30683) /IncR等离子体在Citrobacter freundii ST91中. 等离子体谱系推动了卡巴胺耐药性的传播,需要以等离子体为重点的基因组监测.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 耐卡巴胺的Citrobacter freundii在医疗保健机构中越来越令人担忧.
- 移动的碳烯酶编码元件经常被C. freundii.i.托管.
- 在这种物种中,等离子体载体及其转移机制需要进一步描述.
研究的目的:
- 描述第一个IncFII ((pBK30683) /IncR等离子体,其中C. freundii中的blaKPC-2是ST91.1.
- 为了研究等离子体的可转移性,稳定性和在碳烯耐药性传播中的作用.
- 为了分析驱动卡巴胺耐药性传播的等离子体系.
主要方法:
- 临床C. freundii ST91分离物的全基因组测序 (MAS5905).
- 抗微生物敏感性测试,结合试验和等离子体稳定性研究.
- 包括等离子体和ST91的基因组学在内的比较基因组学.
主要成果:
- 该blaKPC-2基因位于可转移和稳定的IncFII ((pBK30683) /IncR等离子体 (pMAS5905-KPC) 上.
- 该等离子体赋予了对多种β-乳酸盐和诺基诺的耐药性,具有显著的适应性成本.
- 等离子体比较显示了保存的脊椎和广泛的宿主范围,而ST91的基因组学显示了高的碳烯酶基因流行率.
结论:
- 这是C. freundii ST91中的blaKPC-2的IncFII ((pBK30683) /IncR等离子体的首次表征.
- 等离子体系系是碳烯抵抗传播的关键驱动力.
- 聚焦于等离子体的基因组监测对于监测可转移性耐药性至关重要.
关键词:
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