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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A high-resolution genetic signature of demographic and spatial expansion in epizootic rabies virus
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A high-resolution genetic signature of demographic and spatial expansion in epizootic rabies virus

机译:流行性狂犬病病毒的人口和空间扩展的高分辨率遗传特征

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Emerging pathogens potentially undergo rapid evolution while expanding in population size and geographic range during the course of invasion, yet it is generally difficult to demonstrate how these processes interact. Our analysis of a 30-yr data set covering a large-scale rabies virus outbreak among North American raccoons reveals the long lasting effect of the initial infection wave in determining how viral populations are genetically structured in space. We further find that coalescent-based estimates derived from the genetic data yielded an amazingly accurate reconstruction of the known spatial and demographic dynamics of the virus over time. Our study demonstrates the combined evolutionary and population dynamic processes characterizing the spread of pathogen after its introduction into a fully susceptible host population. Furthermore, the results provide important insights regarding the spatial scale of rabies persistence and validate the use of coalescent approaches for uncovering even relatively complex population histories. Such approaches will be of increasing relevance for understanding the epidemiology of emerging zoonotic diseases in a landscape context.
机译:新兴病原体在入侵过程中可能会迅速进化,同时种群规模和地理范围会不断扩大,但通常很难证明这些过程如何相互作用。我们对覆盖北美浣熊大规模狂犬病病毒爆发的30年数据集的分析表明,最初的感染浪潮对确定病毒种群在空间上的遗传结构具有长期的持久影响。我们进一步发现,从遗传数据得出的基于聚结的估计值可以惊人地准确地重建病毒随时间的已知空间和人口动态。我们的研究表明,病原体传入完全易感的宿主种群后,结合了进化和种群动态过程,表征了病原体的传播。此外,研究结果提供了关于狂犬病持续性的空间规模的重要见解,并验证了结合方法用于揭示甚至相对复杂的人口史的使用。这样的方法对于了解景观中新出现的人畜共患疾病的流行病学将具有越来越重要的意义。

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