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首页> 外文期刊>Vaccine >Virulence evolution in response to vaccination: the case of malaria. (Special Issue: The evolutionary consequences of vaccination.)
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Virulence evolution in response to vaccination: the case of malaria. (Special Issue: The evolutionary consequences of vaccination.)

机译:接种疫苗后的毒力演变:疟疾。 (特刊:疫苗的进化后果。)

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摘要

One theory of why some pathogens are virulent (i.e., they damage their host) is that they need to extract resources from their host in order to compete for transmission to new hosts, and this resource extraction can damage the host. Here we describe our studies in malaria that test and support this idea. We go on to show that host immunity can exacerbate selection for virulence and therefore that vaccines that reduce pathogen replication may select for more virulent pathogens, eroding the benefits of vaccination and putting the unvaccinated at greater risk. We suggest that in disease contexts where wild-type parasites can be transmitted through vaccinated hosts, evolutionary outcomes need to be considered.
机译:关于某些病原体为何具有毒性(即它们破坏宿主)的一种理论是,它们需要从宿主中提取资源以竞争向新宿主的传播,而这种资源提取会破坏宿主。在这里,我们描述了我们对疟疾的研究,这些试验证明了这一想法。我们继续表明,宿主免疫力会加剧对毒力的选择,因此,减少病原体复制的疫苗可能会选择更具毒性的病原体,从而削弱了疫苗接种的好处,并使未接种疫苗的风险更高。我们建议,在可以通过接种宿主传播野生型寄生虫的疾病环境中,需要考虑进化结果。

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