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Updated: Jul 2, 2025

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对核酸MALDI-TOF-MS进行评估,用于识别Mycobacterium物种

Yelei Zhu¹, Zhengwei Liu¹, Lina Peng²

¹Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.

Frontiers in cellular and infection microbiology

|February 21, 2024

概括

核酸MALDI-TOF-MS能够准确地识别出Mycobacterium结核病综合体 (MTBC) 和非结核菌 (NTM) 的物种. 这种方法在临床菌根菌鉴定方面表现出很高的性能,有助于及时诊断和改善患者的治疗结果.

科学领域:

临床微生物学临床微生物学
分子诊断学分子诊断学
质谱仪的应用

背景情况:

准确识别Mycobacterium结核复合体 (MTBC) 和非结核菌 (NTM) 对于诊断NTM感染和改善患者预后至关重要.
核酸矩阵辅助激光脱/离子化飞行时间质谱 (MALDI-TOF-MS) 是一种高通量,准确的微生物识别工具,尽管其应用于真菌细菌需要进一步研究.

研究的目的:

为了评估核酸MALDI-TOF-MS的性能,用于识别各种Mycobacterium物种.
为了评估核酸MALDI-TOF-MS与临床分离物的桑格测序相比的准确性.

主要方法:

933个临床Mycobacterium分离物,最初通过MPB64测试确定为NTM,使用核酸MALDI-TOF-MS.进行了分析.
桑格测序被用作黄金标准进行比较.
性能指标的计算是基于与桑格测序结果的一致性.

主要成果:

核酸MALDI-TOF-MS在933个临床Mycobacterium分离物中实现了91.64%的整体正确检测率.
在特定物种中观察到高的正确检测率,包括Mycobacterium intracellulare (99.32%),Mycobacterium abscessus (100%) 和MTBC (100%).
在多种Mycobacterium物种的核酸MALDI-TOF-MS和桑格测序之间发现了良好的一致性 (k > 0.7).

结论:

核酸MALDI-TOF-MS显示出作为确定MTBC和常见临床NTM物种的可靠方法的重大前景.
该技术为临床环境中快速准确的真菌细菌物种化提供了可行的替代方案.

关键词:

在MTBC中,我们可以使用MTBC.在NTM中,NTM是NTM.混合感染混合感染.核酸MALDI-TOF-MS是什么意思标识物种标识物种标识物种

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