使用具有RT-LAMP的分子灯塔检测和区分低毒性和毒性Orthoavulavirus javaense
Megan C Mears1, Timothy L Olivier1, Dawn Williams-Coplin1
1Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratories, US National Poultry Research Center, 934 College Station Road, Athens, GA, 30605, USA.
Scientific reports
|August 5, 2024
概括
一种新的分子信标测定能够快速检测 Newcastle 病病毒 (NDV) 和其病型在家禽中. 这种基于聚变裂变部位的分子信标与反转录循环介导的同热放大 (MB-RT-LAMP) 试验提供了一个敏感和特定的诊断工具.
科学领域:
- 兽医病毒学 兽医病毒学
- 分子诊断学 分子诊断
- 鸟类传染病 鸟类传染病
背景情况:
- 纽卡斯尔病 (ND) 对全球的家禽产业构成重大经济威胁.
- 病毒性毒株的Orthoavulavirus javaense (OAVJ) 导致ND,需要准确的诊断方法.
- 目前的诊断依赖定量实时逆转录PCR (qRT-PCR) 可能耗时且需要专门的设备.
研究的目的:
- 开发和验证一种新的快速检测法,用于检测和区分OAVJ病型.
- 与现有方法相比,评估新试验的灵敏度,特异性和速度.
- 评估测试在资源有限的环境中的适用性.
主要方法:
- 开发基于融合裂变点的分子信标与反转录循环介导的同热放大 (MB-RT-LAMP) 试验.
- 在包括多种基因型在内的OAVJ样本上测试MB-RT-LAMP试验.
- 对快速溶解协议的评估,用于在没有RNA分离的情况下进行直接样本分析.
- 与已建立的qRT-PCR方法对MB-RT-LAMP灵敏度和特异性的比较.
主要成果:
- 在MB-RT-LAMP测定成功检测和差异化OAVJ病型在一个单一的反应.
- 该试验显示OAVJ的高特异性和接近qRT-PCR (10^4副本) 的灵敏性.
- 一个快速的两分钟的溶解协议使得口腔口和样的直接检测成为可能,消除了RNA提取的需要.
- 该试验区分了lentogenic和mesogenic/velogenicOAVJ菌株.
结论:
- MB-RT-LAMP测定提供了一个快速,灵敏和特定的方法来检测OAVJ和病型.
- 它在没有RNA隔离和最小设备的情况下工作的能力使其适用于资源有限的设置.
- 这种分析可以作为一种有效的初级查工具,用于纽卡斯尔病的监测和诊断.
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