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首页> 外文期刊>Journal of Theoretical Biology >Infection dynamics of different Wolbachia-types within one host population
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Infection dynamics of different Wolbachia-types within one host population

机译：一个宿主种群内不同沃尔巴克氏菌类型的感染动力学

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Wolbachia are widespread intracellular symbionts of arthropods which are known to cause several reproductive manipulations in their hosts. the commonest of which being cytoplasmic incompatibility (CI), male killing (MK), and the induction of parthenogenesis (PI). Strains of endosymbionts inducing one of these effects can be referred to as 'Wolbachia-types'. Here, we try to ascertain whether two of these Wolbachia-types can stably coexist within one population. We investigate this question by means of two discrete-time mathematical models which describe the dynamics of an infection of a host population with either CI- and MK- or CI- and PI-Wolbachia. We derive analytical solutions for two special cases of each model showing that stable coexistence of the respective Wolbachia-types is not possible if no doubly infected individuals occur within the population and that stable coexistence is possible when doubly infected hosts do exist and transmission of the endosymbionts is perfect. Moreover, we show that a population infected with either CI- or MK-Wolbachia at equilibrium can resist invasion of the respective other Wolbachia-type as a single infection. In contrast, a population infected with CI-Wolbachia can be invaded by PI-Wolbachia as a single infection with the CI-Wolbachia going extinct. Computer simulations confirmed these findings for the general models. We discuss our results with respect to the prevalence of the Wolbachia-types considered here and the emergence of PI- from Cl- Wolbachia. (C) 2004 Elsevier Ltd. All rights reserved.
机译：沃尔巴氏菌是节肢动物的广泛的细胞内共生体，已知会在其宿主中引起几种生殖操作。其中最常见的是细胞质不相容性（CI），雄性杀伤（MK）和诱导孤雌生殖（PI）。诱导这些作用之一的共生菌菌株可以称为“ Wolbachia型”。在这里，我们尝试确定这些Wolbachia类型中的两种是否可以在一个群体中稳定地共存。我们通过两个离散时间数学模型调查此问题，该模型描述了感染了CI和MK-或CI-和PI-Wolbachia的宿主种群的动力学。我们针对每种模型的两种特殊情况得出了解析解，这些结果表明，如果种群中没有双重感染的个体，则不可能分别存在沃尔巴克菌类型的稳定共存;当确实存在双重感染的宿主并且存在共生共生体时，稳定的共存是可能的。是完美的。此外，我们表明，在平衡状态下感染了CI-或MK-Wolbachia的种群可以抵抗其他Wolbachia类型的入侵，成为单一感染。相反，感染了CI-Wolbachia的人群可以被PI-Wolbachia入侵，因为CI-Wolbachia已灭绝。计算机仿真证实了这些对一般模型的发现。我们讨论了有关此处考虑的沃尔巴克氏菌类型的流行以及从Cl-沃尔巴克氏菌出现PI-的研究结果。 （C）2004 Elsevier Ltd.保留所有权利。

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