一般化人口RT-qPCR循环值 - - 根据流行病学动态的估计:监测实践和病原体变异性的影响
Yun Lin1, James A Hay2, Yu Meng1
1WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China.
PLoS computational biology
|September 29, 2025
概括
病毒载荷测试中的周期值 (Ct) 可以估计各种病原体的实时繁殖数 (Rt). 这种方法在不同的监测策略和病毒传播模式中通常是准确的,作为监测传播的宝贵工具.
科学领域:
- 流行病学 流行病学
- 病毒学 病毒学
- 公共卫生 公共卫生
背景情况:
- 随时间变化的生殖数 (Rt) 的实时估计对于管理传染病爆发至关重要.
- 在监测测试期间从定量PCR (qPCR) 获得的周期值 (Ct) 值显示,在COVID-19期间对Rt估计有希望.
- 基于Ct的Rt估计对其他病原体和监测系统的概括性仍然在很大程度上未被探索.
研究的目的:
- 系统地评估基于Ct的Rt估计在各种模拟的流行病情景中的准确性.
- 评估不同监测测试系统和病原体病毒动力学对估计准确性的影响.
- 确定基于Ct的Rt估计作为传染病监测的补充工具的可靠性.
主要方法:
- 模拟的流行病数据是在各种监控测试策略和病原体病毒泄漏模式下生成的.
- 使用定量PCR (qPCR) 周期值 (Ct) 值来估计时间变化的生殖数 (Rt).
- 使用ROC曲线下的面积 (AUC) 来评估Rt估计在检测流行病增长或下降中的准确性.
主要成果:
- 基于CT的Rt估计准确度受到病例确定率的影响很小,除了严重偏差或长期稳定波的情况下.
- 模型的性能高度依赖于病例检测后单调的病毒泄漏轨迹.
- 具有非单一的病毒分泌模式的病原体表现出较低的估计准确性 (AUC: 0.58).
- 总体上观察到高精度 (AUC:0.76),随着时间的推移稳定检测模式.
结论:
- 基于CT的Rt估计方法在一系列监测条件和病原体流放模式中显示出一般准确性.
- 这些方法可以作为实用的补充工具,及时监控传输.
- 限制,特别是关于非单调的病毒分泌的限制,需要进一步调查以获得最佳应用.
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