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循环介导异热放大用于检测大肠杆菌序列类型复杂131的临床验证
Gisele Peirano1,2, L Ricardo Castellanos1, Yasufumi Matsumura3
1Cummings School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Journal of clinical microbiology
|February 22, 2024
概括
一种新的循环介导同热放大 (LAMP) 试验准确检测出多药耐药的埃舍里希亚大肠杆菌STc131.1. 这种快速的方法有助于控制感染,并识别患者进行脱殖治疗,制全球感染.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 分子诊断学 分子诊断
背景情况:
- 耐多药性 (MDR) Escherichia coli STc131 是一个重要的全球健康威胁,因为它有效的殖民人类的肠道.
- 目前的感染控制策略和针对性去殖民治疗的开发受到STc131.1.快速识别方法的缺乏所阻碍.
研究的目的:
- 开发和验证一种快速的,非培养基的诊断试验,用于特定检测MDR Escherichia coli STc131.1.
- 评估开发的试验在实验室分离物和临床标本中识别STc131的性能.
主要方法:
- 一个循环介导的同热放大 (LAMP) 试验,指定LAMP-ST131,被设计用于检测STc131.1.
- 评估LAMP-ST131试验使用一组具有良好特征的大肠杆菌分离物 (n=720).
- 进一步评估了该试验的性能,使用临床样本,包括尿样 (n=550) 和便拭子 (n=278),并与传统培养和PCR方法进行了比较.
主要成果:
- 在大肠杆菌分离物中,LAMP-ST131在识别STc131方面表现出很高的准确性,灵敏度为100%和特异性为98.9%.
- 在临床样本中,测试显示尿液的敏感度为97.6%,便的敏感度为100%,分别为92.3%和83.9%.
- 该试验能够检测尿液中仅有10个基因拷贝/μL,而便拭子中仅有100个基因拷贝/μL,这表明其灵敏度很高.
结论:
- 开发的LAMP-ST131测定方法为在临床环境中识别MDR Escherichia coli STc131提供了快速而准确的方法.
- 实施LAMP-ST131可以显著提高基因组监测,促进及时的感染控制干预,并使患者能够选择去殖民化疗法.
- 这种诊断工具有可能通过制STc131传播来减少MDR大肠杆菌感染的全球负担.
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