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通过循环介导的异热放大试验快速识别主要的Mycobacterium物种,使用新的特定物种的基因组标
Yuanwu Zou1,2, Zhuo Wang1, Zihan Wei3
1Department of Clinical Laboratory, Shaanxi Provincial Hospital of Tuberculosis Prevention and Treatment, The Fifth People's Hospital of Shaanxi Province, Xi'an, China.
Frontiers in cellular and infection microbiology
|October 3, 2025
概括
一种新的多重循环介导同热放大 (LAMP) 试验准确地识别了Mycobacterium结核复合体 (MTBC) 和非结核性菌根菌 (NTM) 物种. 这种快速诊断工具适用于资源较少的环境,改善了结核病管理.
科学领域:
- 微生物学 微生物学
- 分子诊断学 分子诊断学
- 传染性疾病 传染性疾病
背景情况:
- 准确识别Mycobacterium物种对于结核病 (TB) 管理和监测至关重要.
- 传统方法难以区分密切相关的非结核菌菌 (NTM) 物种,影响临床效用.
- 需要快速,精确的诊断工具,同时检测出Mycobacterium结核病综合体 (MTBC) 和NTM.
研究的目的:
- 开发和验证一个多重循环介导的同热放大 (LAMP) 试验.
- 该试验针对特定物种的基因组标志物,用于同时检测MTBC和六种临床上重要的NTM物种.
- 评估开发的多重LAMP试验的分析和临床性能.
主要方法:
- 设计了一种多重LAMP试验,使用新发现的特定物种的基因组标记物.
- 用细菌培养和参考菌株的连续稀释来评估分析灵敏度.
- 临床验证涉及52个培养分离物和349个唾液样本,与GeneXpert MTB/RIF和商业PCR反向点点测试进行了比较.
主要成果:
- 该试验显示出高分析灵敏度,MTBC和NTM物种的检测极限较低.
- 所有参考菌株都被正确识别,没有交叉反应.
- 临床验证显示,样中MTBC的灵敏度为90.32%,特异性为97.55%,总体一致性高 (93.70%).
- 测试正确地确定了一个具有挑战性的M. massiliense病例,将其与M. abscessus区分开来.
结论:
- 多重LAMP试验提供了一种快速,准确和现场部署的方法,用于在物种层面识别MTBC和主要NTM病原体.
- 它的简单性,稳定性和适用于低资源环境的适用性使其成为常规诊断的有价值产品.
- 该试验支持分散的结核病计划,并改善了在临床和流行病学环境中的菌根菌种鉴定.
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