高通量临床抗微生物敏感性测试和药物耐药性亚种群检测在格拉姆阴性细菌中
QingFeng Hu1,2, Yuhan Zhou3, Yongze Zhu2
1School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, Zhejiang, China.
Microbiology spectrum
|June 5, 2025
概括
新的Easy and Zooming MTT (EZMTT) 抗微生物敏感性测试方法提高了检测耐药细菌亚群的敏感性. 这种进步是对传统方法的改进,有助于打击抗菌素耐药性.
科学领域:
- 微生物学 微生物学
- 临床诊断 临床诊断 临床诊断
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 细菌耐药性是全球主要的健康威胁.
- 现有的抗微生物敏感性测试 (AST) 方法,如汁微稀释 (BMD),难以检测出小的,耐药的细菌亚群.
- 这种局限性可能导致细菌被错误地归类为敏感的细菌,从而影响治疗的有效性.
研究的目的:
- 评估基于优化Easy and Zooming MTT (EZMTT) 的AST方法对阴性细菌的性能.
- 评估EZMTT检测以前无法检测到的耐药亚群的能力.
- 将EZMTT的灵敏度,一致性和稳定性与黄金标准和商业AST方法进行比较.
主要方法:
- 优化简单和放大MTT (EZMTT) 测定用于抗菌感应性测试 (AST).
- 使用205个临床格兰阴性细菌样本和生成的异能耐药菌株,将EZMTT与微稀释 (BMD) 和VITEK方法进行比较.
- 对23种抗生素的敏感性,检测极限,阳性/阴性合规率和卡帕值的评估.
主要成果:
- EZMTT 显示了 5 到 20 倍的增强灵敏度和较低的检测极限 (大约. 1.13%) 与骨硬化 (大约) 相比. 10.15%) 的比例.
- 实现了高的整体合规率 (98.94%的阳性,99.58%的阴性) 和kappa值 (0.981).
- EZMTT在临床分离物 (例如, *K. pneumoniae* KP007) 和异种耐药菌株中准确地确定了耐药亚群,表现优于BMD和VITEK.
结论:
- EZMTT 方法是一种高度敏感和一致的 AST 工具,用于检测 Gram 阴性细菌中的耐药亚群.
- EZMTT 提供了与现有方法相比的显著改进,特别是在识别低频耐药细菌方面.
- 这种方法有望改善临床诊断和指导抗菌治疗策略,以对抗抗菌素耐药性.
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