与甲基西林耐药黄金葡萄球菌的外体感染相关的因素
Kevin Bouiller1,2, Natasia F Jacko1, Margot J Shumaker1
1Division of Infectious Diseases, Department of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
Frontiers in immunology
|March 4, 2024
概括
这项研究发现,虽然某些患者因素增加了在甲素耐药黄金葡萄球菌 (MRSA) 血流感染 (BSI) 中外体感染的风险,但MRSA的血液感染 (BSI) 增加了外体感染的风险.
科学领域:
- 医学微生物学 医学微生物学
- 传染性疾病 传染性疾病
- 临床医学 临床医学
背景情况:
- 甲素耐药黄金葡萄球菌 (MRSA) 血流感染 (BSI) 在植入器件的患者中可能导致异物感染 (FBIs).
- 了解与FBI相关的因素对于患者管理和感染控制至关重要.
研究的目的:
- 在患有MRSA BSI的患者中,比较引起FBI的MRSA菌株与不引起FBI的MRSA菌株的特征.
- 为了确定与MRSA FBIs相关的患者相关和细菌因素.
主要方法:
- 在两家医院 (2018年7月 - 2022年3月) 进行了MRSA BSI和至少一个异体的成年患者的回顾性分析.
- 患者人口统计学,MRSA序列类型 (ST) 和在FBI和没有FBI的患者之间体外生物膜生产的比较.
- 多变量分析以确定FBI的独立风险因素.
主要成果:
- 在118名外体患者中,51名患有FBI. FBI的危险因素包括先前的MRSA感染,社区相关的BSI,手术部位感染,多个异物,植入和感染之间的短时间 (<18个月),以及延迟的阳性血培养 (≥48小时).
- ST8是最常见的序列类型 (39%),其次是ST5 (29%) 和ST105 (20%),FBI和非FBI之间的ST分布没有显著差异.
- 只有39%的MRSA分离物形成了中度/强度的生物膜;生物膜的形成与FBI没有显著的关联,但与ST8和特定患者因素有关.
结论:
- 诸如先前的MRSA感染和设备的接近等因素是MRSAFBI的关键,通常表明持续感染.
- 虽然MRSA分离体的生物膜产生并没有直接增加FBI的风险,但它与特定的遗传系 (特别是ST8) 相关,这表明它在感染持久性或严重性方面发挥了作用.
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