在人类临床样本中通过封闭的LAMP测试向mecA和spa基因快速视觉检测甲素耐药黄金葡萄球菌
Noora S A Abusheraida1, Asraa A H AlBaker1, Asmaa S A Aljabri1
1College of Health Science, Qatar University, Doha P.O. Box 2713, Qatar.
Microorganisms
|January 23, 2024
概括
一种新的循环介导异热放大 (LAMP) 方法在临床样本中快速检测出耐美西林黄金葡萄球菌 (MRSA). 这种色度测试具有高特异性和灵敏度,对于对抗抗菌素耐药性至关重要.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 临床诊断 临床诊断 临床诊断
背景情况:
- 抗菌素耐药性 (AMR),特别是来自抗甲素黄金葡萄球菌 (MRSA),是一个日益严重的全球卫生危机.
- 现有的MRSA诊断方法可能耗时,延迟了适当的患者治疗.
- 从临床样本直接检测MRSA的快速和准确检测对于有效的感染控制至关重要.
研究的目的:
- 开发和验证一种快速的,闭环管循环介导的同热放大 (LAMP) 方法,用于直接检测MRSA.
- 使用氧-纳夫托蓝 (HNB) 颜色测量染料测定用于MRSA的视觉识别.
- 评估LAMP测定与传统PCR和素盘扩散相比的性能.
主要方法:
- 封闭管环介导同热放大 (LAMP) 试验旨在检测MRSA特有的mecA和spa基因.
- 氧纳蓝 (HNB) 染料被用于色度检测,使可视化结果.
- 该试验是在125个预先识别的S上进行测试的. 黄金色隔离物和93个临床样本,结果与传统PCR和Cefoxitin磁盘扩散相比.
主要成果:
- 与PCR相比,LAMP试验显示出高的诊断准确性,临床样本的特异性为100%,敏感性为91.23%.
- 对于临床分离物,灵敏度达到97%,科恩·卡帕值显示出极好的一致性 (0.90-0.926).
- 与塞福西丁盘扩散相比,LAMP试验实现了100%的特异性和灵敏性,周转时间小于1小时.
结论:
- 使用HNB染料的闭管LAMP方法是一种快速,特定和敏感的技术,用于从临床样本中直接检测MRSA.
- 这种测试比现有方法有显著的改进,在不到一个小时内提供结果.
- 开发的LAMP试验是及时诊断和管理MRSA感染的宝贵工具,有助于打击抗菌素耐药性.
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