在Burkholderia cepacia复杂敏感性测试中对汁微稀释和梯度扩散方法的比较评估:过渡到基于ECV的解释的含义
Wenjie Cui1,2, Rongqi Lu1,3, Shaolong Huang4
1Department of Laboratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
The Journal of antimicrobial chemotherapy
|July 31, 2025
概括
使用Etest和汁微稀释 (BMD) 对Burkholderia cepacia复合体 (BCC) 的抗微生物敏感性测试 (AST) 显示了持续的差异,即使是新的流行病学截止值 (ECV). 临床结果与体外敏感性结果的相关性有限.
科学领域:
- 临床微生物学 临床微生物学
- 抗微生物耐药性 抗微生物耐药性
- 传染性疾病 传染性疾病
背景情况:
- Burkholderia cepacia复合体 (BCC) 是一种机会性病原体,可引起严重感染,特别是在免疫受损的个体中.
- 准确的抗微生物敏感性测试 (AST) 对于指导BCC感染的治疗决策至关重要.
- 目前的指导方针正在从MIC断点过渡到流行病学切线值 (ECV),需要评估AST方法的性能.
研究的目的:
- 为了比较汁微稀释 (BMD) 和Etest对BCC分离物的AST的性能.
- 评估采用CLSI 2025流行病学截止值 (ECV) 对AST结果的影响,与2024年MIC断点相比.
- 评估体外敏感性数据与BCC患者的临床结果之间的相关性.
主要方法:
- 通过MALDI-TOF质谱法确定了90个临床BCC分离物.
- 用关键抗菌剂的BMD和Etest进行了AST.
- 用2024年CLSI MIC断点和2025年ECV来分析结果,计算了分类协议 (CA) 和基本协议 (EA).
- 对44名患者的临床结果进行了审查,以查看与AST结果的相关性.
主要成果:
- 埃特斯特和BMD之间的绝对一致性差异很大,在2024年断点下,对美罗 (12.2%) 的一致性很低.
- 所有代理商的基本协议低于90%的门.
- 通过2025年ECVs改善了一些代理人的CA,但并没有解决大多数不可接受的错误率.
- 观察到特定物种的耐药性模式,只有40.9%的临床病例显示出体外敏感性和治疗结果之间的一致性.
结论:
- 对于BCC分离物,Etest和BMD之间的MIC水平差异仍然存在,尽管ECVs已经实施.
- 特定物种的耐药性概况需要仔细解释AST结果.
- 在体外敏感性和临床结果之间的低一致性强调了仅依赖AST对BCC治疗决策的局限性.
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