Adaptive genetic diversification of Lassa virus associated with the epidemic split of north-central Nigerian and non-Nigerian lineages

文献类型： 外文期刊

第一作者： Li, Yan

作者： Li, Yan;Tian, Haifeng

作者机构：

关键词： Lassa virus; Adaptive genetic diversification; Molecular epidemiology; North-central nigerian lineage; Non-nigerian lineages; L protein

期刊名称：VIROLOGY （ 影响因子：3.616； 五年影响因子：3.967 ）

ISSN： 0042-6822

年卷期： 2020 年 545 卷

页码：

收录情况： SCI

摘要： Lassa fever (LF) is a viral hemorrhagic fever that causes high morbidity and severe mortality annually. The disease is endemic to two geographically separate areas within tropical West Africa, one in Nigeria and the second predominantly in Sierra Leone-Guinea-Liberia-Mali. Lassa virus (LASV), the causative agent of the disease, exhibits clear delineation of phylogeography between the endemic areas. In order to characterize the genetic nature of Nigerian-non-Nigerian epidemic split, we performed molecular epidemiological analyses on non-Nigerian isolates (lineage IV as well as lineage V) and their sister group from north-central Nigeria (lineage III). The results showed that adaptive genetic diversification has occurred between these currently circulating clusters in the spread process, and a number of replacement divergences have been fixed between these clusters on the viral RNA-dependent RNA polymerase (L protein). This study highlights the viral L protein could be a determinant factor for the epidemic split.

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