尼帕病毒在空间尺度上的遗传多样性
Oscar Cortés Azuero1, Noémie Lefrancq1, Birgit Nikolay2
1Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK.
medRxiv : the preprint server for health sciences
|July 28, 2023
概括
蝙蝠中的尼帕病毒 (NiV) 多样性被低估了,即使在单个里,多个遗传集群也在共同循环. 这种复杂的NiV生态,包括缓慢的空间传播,影响溢出风险和公共卫生战略.
科学领域:
- 病毒学 病毒学
- 流行病学 流行病学
- 基因组学就是基因组学.
背景情况:
- 尼帕病毒 (NiV) 是一种高度致命的动物性病毒,在亚洲各地的蝙蝠中传播.
- 了解NiV的遗传多样性和空间传播对于预测和预防人类疫情至关重要.
- 目前对蝙蝠种群中NiV多样性的知识仍然有限,因为在基因组获取方面存在挑战.
研究的目的:
- 描述尼帕病毒 (NiV) 在类蝙蝠中的遗传多样性和空间分布.
- 调查蝙蝠和更大的地理区域内共同循环的NiV血统的数量.
- 评估NiV多样性对溢出风险和公共卫生干预措施的影响.
主要方法:
- 对257个NiV基因组 (175个来自蝙蝠,73个来自人类) 的综合数据集进行了全系遗传学分析,涵盖了22年 (1999-2020年) 和6个国家.
- 应用近似贝叶斯计算来建模病毒空间多样性和估计集群分布.
- 来自孟加拉国和柬埔寨集中监测地点的基因组数据的分析.
主要成果:
- 确定了四个主要的NiV亚系,分为15个遗传集群,起源于20-44年前.
- 每个蝙蝠中平均发现2.4个共同循环的NiV遗传集群,在1500-2000公里范围内增加到5.5个集群.
- 据估计,每个NiV星团平均占地面积为130万公里2,即使在经过充分监测的地区,也有显著的多样性仍未被发现 (约85%).
结论:
- 独特的NiV血统根深蒂固,并在蝙蝠种群中共同循环,甚至在位水平上.
- 尼维在更大的空间尺度上表现出缓慢的迁移模式,影响其流行病学动态.
- 尚未发现的大量NiV多样性凸显了扩大基因组监测的必要性,以更好地了解溢出风险.
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