基于克林达米辛的暴露策略在实验性成熟葡萄球菌生物膜中的有效性
S C J van Dun1, M Verheul1,2, B G C W Pijls2
1Center for Infectious Diseases, Lab of Infectious Diseases, Leiden University Medical Center, Leiden, the Netherlands.
Microbiology spectrum
|January 30, 2025
概括
克林达米辛单一治疗对于最初的假肢关节感染治疗是无效的. 然而,它有效地降低了Staphylococcus aureus生物膜,当在里芬素-西普罗夫洛克萨辛治疗后切换时,为无法耐受长期里芬素的患者提供了潜在的替代方案.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 生物材料科学 生物材料科学
背景情况:
- 假肢关节感染 (PJI) 由于抗菌素耐药性和标准治疗方案的副作用,造成了治疗挑战.
- 利芬素-西普罗夫洛克萨是指导方针推的一线治疗PJIs,但其使用受到不良影响的限制.
- 需要采用替代治疗策略,最近的研究表明,克林达米辛可能在以利芬素为基础的治疗后有效.
研究的目的:
- 通过使用各种暴露策略,在成熟的生物膜中研究克林达米辛对金黄色葡萄球菌的疗效.
- 为了确定在PJI管理的后期阶段,克林达米辛是否可以成为可行的替代治疗选择.
- 提供体外证据,支持在PJI患者中从利芬素-西普罗夫洛克萨转换为克林达米.
主要方法:
- 在聚烯板和--磁盘上生成7天成熟的金黄色葡萄球菌生物膜.
- 生物膜通过单次24小时,延长48小时或72小时和重复24小时的策略暴露于克林达米辛.
- 连续暴露涉及初始的利芬辛-西普罗夫洛克萨辛,其次是克林达米辛.
- 评估细菌负载减轻 (CFU/mL) 和评估生物膜结构使用共聚焦激光扫描和原子力显微镜.
主要成果:
- 单次或长时间暴露于克林达米辛并没有显著减少细菌负载.
- 从第三次剂量开始,重复的24小时克林达米辛暴露在度≥16 mg/L时实现了>3 log CFU/mL的减少.
- 连续的利法素-西普罗夫洛克萨辛,然后是克林达米辛,导致CFU/mL减少3至4个逻辑,与持续的利法素-西普罗夫洛克萨辛治疗相比.
结论:
- 克林达米辛单一治疗对于启动PJI治疗不是最优的.
- 在后期的PJI治疗阶段,从利芬素-齐普罗夫洛克萨切换到克林达米是有效的 in vitro.
- 克林达米辛为那些不能耐受长期以利芬素为基础的治疗的PJI患者提供了潜在的替代方案.
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