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首页> 外文期刊>Journal of Parasitology >Parasites in a biodiversity hotspot: a survey of hematozoa and a molecular phylogenetic analysis of Plasmodium in New Guinea skinks
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Parasites in a biodiversity hotspot: a survey of hematozoa and a molecular phylogenetic analysis of Plasmodium in New Guinea skinks

机译:生物多样性热点中的寄生虫:新几内亚石龙子中血虫的调查和疟原虫的分子系统发育分析

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摘要

A sample of 204 skinks (Squamata: Scincidae) from 10 genera representing 24 species were collected from 10 different localities in New Guinea and examined for blood parasites. Hemogregarines, trypanosomes, microfilarial worms, and 8 infections showing 2 distinct morphological types of malaria parasites (Plasmodium sp.) were observed. Molecular sequence data, in the form of mitochondrial cytochrome b sequences from the Plasmodium infections, showed 2 distinct clades of parasites, 1 in Sphenomorphus jobiense hosts and 1 in Emoia spp., which correspond to the 2 morphotypes. There was substantial genetic variation between the 2 clades, as well as within the clade of Emoia parasites. Nearly half of the skinks sampled had green blood pigmentation, resulting from the presence of biliverdin in the plasma; however, only 1 of these lizards was infected with Plasmodium sp. and only 2 had any blood parasites. These preliminary results suggest a high degree of phylogenetic diversity but a very low prevalence of Plasmodium spp. infections in the skinks of this globally important biodiversity hot spot.
机译:从新几内亚的10个不同地区收集了代表24种物种的10个属的204种石龙子(鳞茎:Scincidae)的样本,并检查了其血液中的寄生虫。观察到了血茄素,锥虫,微丝虫和8种感染,它们显示2种不同形态的疟原虫(Plasmodium sp。)。来自疟原虫感染的线粒体细胞色素b序列形式的分子序列数据显示,有2个不同的寄生虫进化枝,在Sphenomorphus jobiense宿主中为1个,在Emoia spp。中为1个,对应于2个形态型。在两个进化枝之间,以及在Emoia寄生虫的进化枝内,都有大量的遗传变异。由于血浆中存在胆绿素,导致近一半的石龙子有绿色的血色素沉着。但是,这些蜥蜴中只有1个感染了疟原虫。只有2个有血液寄生虫。这些初步结果表明,高度的系统发育多样性,但疟原虫属物种的患病率非常低。这个全球重要的生物多样性热点的石龙子感染。

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