Centre for Emerging, Endemic and Exotic Diseases (CEEED),Department of Pathobiology and Population Sciences,The Royal Veterinary College, University of London,Hatfield AL9 7TA,UK.
Centre de Biologie et de Gestion des Populations (CBGP),Institut de Recherche pour le Développement (IRD),Campus ISRA-IRD Bel Air, Dakar BP1386,Senegal.
Parasitology. 2019 Mar;146(3):299-304. doi: 10.1017/S0031182018001427. Epub 2018 Aug 28.
Hydatigera (Cestoda: Taeniidae) is a recently resurrected genus including species seldom investigated in sub-Saharan Africa. We surveyed wild small mammal populations in the areas of Richard Toll and Lake Guiers, Senegal, with the objective to evaluate their potential role as intermediate hosts of larval taeniid stages (i.e. metacestodes). Based on genetic sequences of a segment of the mitochondrial DNA gene cytochrome c oxidase subunit 1 (COI), we identified Hydatigera parva metacestodes in 19 out of 172 (11.0%) Hubert's multimammate mice (Mastomys huberti) and one out of six (16.7%) gerbils (Taterillus sp.) and Hydatigera taeniaeformis sensu stricto metacestodes in one out of 215 (0.5%) Nile rats (Arvicanthis niloticus). This study reports epidemiological and molecular information on H. parva and H. taeniaeformis in West African rodents, further supporting the phylogeographic hypothesis on the African origin of H. parva. Our findings may indicate significant trophic interactions contributing to the local transmission of Hydatigera spp. and other parasites with similar life-cycle mechanisms. We therefore propose that further field investigations of rodent population dynamics and rodent-borne infectious organisms are necessary to improve our understanding of host-parasite associations driving the transmission risks of rodent parasites in West Africa.
Hydatigera（绦虫：带科）是一个最近复活的属，包括在撒哈拉以南非洲很少研究的物种。我们在塞内加尔的理查德·托尔和盖尔斯湖地区调查了野生小型哺乳动物种群，目的是评估它们作为幼虫阶段（即囊尾蚴）中间宿主的潜在作用。基于线粒体 DNA 基因细胞色素 c 氧化酶亚基 1（COI）的一段遗传序列，我们在 172 只 Hubert 多齿鼠（Mastomys huberti）中有 19 只（11.0%）和 6 只沙鼠（Taterillus sp.）中有 1 只（16.7%）中鉴定出 Hydatigera parva 囊尾蚴，在 215 只尼罗河巨鼠（Arvicanthis niloticus）中有 1 只（0.5%）中鉴定出 Hydatigera taeniaeformis sensu stricto 囊尾蚴。本研究报告了西非啮齿动物中 H. parva 和 H. taeniaeformis 的流行病学和分子信息，进一步支持了 H. parva 起源于非洲的系统地理学假说。我们的发现可能表明存在重要的营养相互作用，有助于 Hydatigera spp. 和其他具有相似生命周期机制的寄生虫在当地传播。因此，我们建议进一步进行啮齿动物种群动态和啮齿动物传播的传染病原体的实地调查，以提高我们对宿主-寄生虫关联的理解，这些关联驱动着西非啮齿动物寄生虫的传播风险。
