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首页> 外文期刊>Parasitology >Prevalence and diversity of Plasmodium and Haemoproteus parasites in the globally-threatened Aquatic Warbler Acrocephalus paludicola
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Prevalence and diversity of Plasmodium and Haemoproteus parasites in the globally-threatened Aquatic Warbler Acrocephalus paludicola

机译：在全球受到威胁的水生莺Acrocephalus paludicola中，疟原虫和血红杆菌寄生虫的流行和多样性

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摘要

The diversity and prevalence of malaria parasites of the genera Plasmodium and Haemoproteus were determined in the globally-threatened Aquatic Warbler Acrocephalus paludicola. Birds were sampled during migration in Portugal and at the wintering quarters in Senegal and parasites were detected using molecular methods. Only three generalist parasite lineages (Plasmodium) were found. There were no significant differences in the prevalence of parasites between sexes in Europe, but adults had higher prevalence than first-year birds, and birds in Europe had higher prevalence than those captured in Africa. When comparing with other Acrocephalus species and taking sample size into account, Aquatic Warblers had the lowest prevalence and, together with another threatened species, the Seychelles Warbler Acrocephalus sechellensis, the lowest diversity of malaria parasites. We hypothesize that the low diversity of parasites and absence of specialist lineages of Aquatic Warblers are caused by its small population size and fragmented distribution. Furthermore, Aquatic Warblers' extreme habitat specialization may decrease their exposure to malaria parasites, but other explanations such as high mortality (which would constraint the sampling of infected birds) or, in contrast, very efficient immunological system in clearing the infections cannot be ruled out. This study contributes to explain variation in prevalence and diversity of malaria parasites among hosts.
机译：在全球受到威胁的水生莺Acrocephalus paludicola中，确定了疟原虫和变形杆菌属的疟原虫的多样性和患病率。在葡萄牙和塞内加尔的迁徙期间对鸟类进行了采样，并在塞内加尔的冬季进行了采样，并使用分子方法检测了寄生虫。仅发现了三个通才寄生虫谱系（疟原虫）。在欧洲，性别之间的寄生虫流行率没有显着差异，但是成年鸟类的流行率高于一年级鸟类，欧洲鸟类的流行率高于非洲鸟类。当与其他顶头猴物种进行比较并考虑样本量时，水生莺的患病率最低，而与另一濒危物种塞舌尔鸣鸟Acrocephalus sechellensis的疟疾寄生虫多样性最低。我们假设寄生虫的多样性低和缺乏水生莺的专业血统是由于其种群规模小和分布分散。此外，水生莺的极端栖息地专长可能会减少其对疟疾寄生虫的接触，但是不能排除其他解释，例如高死亡率（这将限制受感染鸟类的采样），或者相反，无法消除清除感染的非常有效的免疫系统。这项研究有助于解释宿主之间疟疾寄生虫的流行率和多样性。

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