使用贝叶斯时间延迟模型建模西尼罗病毒的温度依赖的外部潜伏期
Maisie Vollans1, Julie Day1, Susie Cant1
1Infectious Disease Modelling Team, All Hazards Intelligence, DAS, UKHSA, UK.
The Journal of infection
|September 29, 2024
概括
温度显著影响西尼罗河病毒 (WNV) 传播. 在更温暖的温度下,蚊子的较短外在化期 (EIP) 加快了WNV的发展,增加了人类感染的风险.
科学领域:
- 载体传播疾病 载体传播疾病
- 流行病学 流行病学
- 亚博病毒学 亚博病毒学
背景情况:
- 西尼罗河病毒 (WNV) 是蚊子传播的重要病原体,有可能传播给人类.
- 外在化期 (EIP) 对WNV传播动态至关重要.
- 了解温度依赖的EIP变化对于预测WNV传播至关重要.
研究的目的:
- 重新分析Culex pipiens蚊子中WNV感染的实验数据.
- 描述温度和WNV的外部潜伏期 (EIP) 之间的关系.
- 通过温度梯度来比较不同WNV菌株的传染性.
主要方法:
- 贝叶斯时间延迟模型被用来分析现有的实验数据.
- 在受控温度条件下,Culex pipiens蚊子的队列暴露于WNV.
- 蚊子中传播的WNV感染在定义的时间点被监测.
主要成果:
- WNV EIP最好用韦布尔分布来描述,并且随着温度的增加,在日志线上下降.
- 在30°C时,超过42%的蚊子传播了感染,而在18°C时则不到1%.
- 在较低的温度下,WNV菌株WN02在较低的温度下比NY99具有竞争优势.
结论:
- 温度是WNV外部化期的关键决定因素,影响传播速率.
- 该研究为WNV传播模型和干预策略提供了关键参数.
- 在EIP的变化,特别是在较低的温度下,强调需要进行详细的时间分析.
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