基因组学揭示了黄金葡萄球菌在长期尿道导管治疗期间仍然存在,尽管抗菌药物治疗和导管交换
Jesus M Duran Ramirez1, Chelsie E Armbruster2, Blake M Hanson3,4
1Department of Microbiology and Molecular Genetics, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA.
Nature communications
|January 13, 2026
概括
包括MRSA在内的多药耐药黄金葡萄球菌可以在长期尿道导管使用者中持续几周以无症状细菌性尿病 (ASB) 的形式存在. 标准治疗往往无法根除这些持久的金黄色细菌ASB感染.
科学领域:
- 微生物学与传染病的研究
- 基因组学和生物信息学
- 医疗器械和与医疗相关的感染
背景情况:
- 尿导管是常见的医疗器械,与导管相关的尿路感染 (CAUTI) 和无症状细菌尿 (ASB) 的风险增加有关.
- 长期尿道导管 (LTUC) 用户面临这些感染的最高风险,这些感染通常是由研究不足的尿病原体引起的.
- 黄金葡萄球菌 (Staphylococcus aureus) 是一个研究不足的尿病原体,经常涉及CAUTI和ASB.
研究的目的:
- 调查LTUCs的个体中黄金葡萄球菌的基因组特征和持久性.
- 了解导致ASB和CAUTI的S. aureus菌株的遗传关系和抗菌素耐药性概况.
- 评估常见干预措施对LTUC使用者持久性黄金菌ASB的有效性.
主要方法:
- 采用全基因组测序分析了来自20名LTUC患者的153个纵向S. aureus分离物.
- 随着时间的推移,从尿液或尿导管样本中收集了分离物 (平均每人8个分离物).
- 基因组分析的重点是遗传关系,抗菌素耐药性基因和毒性因素.
主要成果:
- 大多数S. aureus菌株具有多药耐药性 (MDR),包括甲素耐药性S. aureus (MRSA),主要属于序列类型5.
- 同一个金黄色细菌菌株作为ASB持续平均13周,即使在抗生素治疗和导管更换.
- 在一个实例中,持久的ASB转变为症状性CAUTI;纵向菌株显示最小的基因组变异和稳定的耐药性/病毒性概况.
结论:
- 黄金色 S. MDR 可以在LTUC使用者中建立长期持久的ASB,这构成了重大的临床挑战.
- 标准的微生物降低LTUC的策略在根除持久性黄金 S. ASB. 方面基本上无效.
- 黄金菌株的基因组稳定性表明,它是一种有弹性的病原体,能够长期殖民和潜在感染.
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