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Does multiple infection select for raised virulence?

机译:是否选择多重感染以提高毒力?

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Classical models of virulence evolution conclude that the increased competition favoured by multiple infection will select for increasing consumption and deterioration of the host resource, or 'virulence' However, recent empirical and theoretical studies suggest that this view of virulence has some shortcomings. Here, we argue that the evolutionary consequences of multiple infection depend critically on whether the exploitation rate of an individual parasite is governed directly by the behaviour ofthe individual, or whether it is limited by the collective behaviour of the coinfecting group. We illustrate that, depending on the mechanistic details of exploitation, multiple infection can select for reduced virulence.
机译:毒力进化的经典模型得出结论,多重感染所促进的竞争加剧将选择增加宿主资源或“毒力”的消耗和恶化。然而,最近的经验和理论研究表明,这种毒力观点有一些不足之处。在这里,我们认为多重感染的进化后果关键取决于个体寄生虫的利用率是直接由个体的行为来控制,还是由并发感染群体的集体行为所限制。我们举例说明,根据开发的机械细节,可以选择多重感染以降低毒力。

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