Redescription, molecular characterisation and Wolbachia endosymbionts of Mansonella (Tupainema) dunni (Mullin & Orihel, 1972) (Spirurida: Onchocercidae) from the common treeshrew Tupaia glis Diard & Duvaucel (Mammalia: Scandentia) in Peninsular Malaysia

Ahmad Syihan Mat Udin , Shigehiko Uni , Jules Rodrigues , Coralie Martin , Kerstin Junker , Takeshi Agatsuma , Van Lun Low , Weerachai Saijuntha , Hasmahzaiti Omar , Nur Afiqah Zainuri , Masako Fukuda , Makoto Matsubayashi , Daisuke Kimura , Hiroyuki Takaoka , Rosli Ramli
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Abstract

The genus Mansonella Faust, 1929 includes 29 species, mainly parasites of platyrrhine monkeys in South America and anthropoid apes in Africa. In Malaysia, Mansonella (Tupainema) dunni (Mullin & Orihel, 1972) was described from the common treeshrew Tupaia glis Diard & Duvaucel (Scandentia). In a recent classification of the genus Mansonella, seven subgenera were proposed, with M. (Tup.) dunni as a monotypic species in the subgenus Tupainema. In this study, we collected new material of M. (Tup.) dunni from common treeshrews in Peninsular Malaysia and redescribed the morphological features of this species. We found that M. (Tup.) dunni differs from M. (Cutifilaria) perforata Uni et al., 2004 from sika deer Cervus nippon (Cetartiodactyla) in Japan, with regards to morphological features and predilection sites in their respective hosts. Based on multi-locus sequence analyses, we examined the molecular phylogeny of M. (Tup.) dunni and its Wolbachia genotype. Species of the genus Mansonella grouped monophyletically in clade ONC5 and M. (Tup.) dunni was placed in the most derived position within this genus. Mansonella (Tup.) dunni was closely related to M. (M.) ozzardi (Manson, 1897) from humans in Central and South America, and most distant from M. (C.) perforata. The calculated p-distances between the cox1 gene sequences for M. (Tup.) dunni and its congeners were 13.09% for M. (M.) ozzardi and 15.6–16.15% for M. (C.) perforata. The molecular phylogeny of Mansonella spp. thus corroborates their morphological differences. We determined that M. (Tup.) dunni harbours Wolbachia endosymbionts of the supergroup F genotype, in keeping with all other Mansonella species screened to date.

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马来西亚半岛常见树蛙 Tupaia glis Diard & Duvaucel(哺乳纲:Scandentia)的 Mansonella (Tupainema) dunni (Mullin & Orihel, 1972)(螺旋体:盘尾丝虫科)的重新描述、分子特征和 Wolbachia 内共生物
Mansonella Faust(1929 年)属包括 29 个种,主要寄生于南美洲的板猴和非洲的类人猿。在马来西亚,Mansonella (Tupainema) dunni (Mullin & Orihel, 1972) 被描述为寄生于普通树蛙 Tupaia glis Diard & Duvaucel (Scandentia)。(Tup.) dunni 为 Tupainema 亚属中的单型种。在本研究中,我们从马来西亚半岛的普通树蛙身上采集到了 M. (Tup.) dunni 的新材料,并重新描述了该物种的形态特征。我们发现,M. (Tup.) dunni与M. (Cutifilaria) perforata Uni等人,2004年从日本梅花鹿Cervus nippon(Cetartiodactyla)身上采集到的M. (Cutifilaria) perforata在形态特征和各自宿主的偏好部位方面存在差异。基于多焦点序列分析,我们研究了 M. (Tup.) dunni 的分子系统进化及其 Wolbachia 基因型。Mansonella (Tup.) dunni被置于该属中最衍生的位置。M. (Tup.) dunni 与中美洲和南美洲人类的 M. (M.) ozzardi (Manson, 1897) 关系密切,而与 M. (C.) perforata 的关系最为疏远。M. (Tup.) dunni 与其同系物的 cox1 基因序列之间的 p-距离计算结果为:M. (M.) ozzardi 为 13.09%,M. (C.) perforata 为 15.6-16.15%。因此,曼氏菌属的分子系统发育证实了它们的形态差异。我们确定,M. (Tup.) dunni 内含 F 超群基因型的 Wolbachia 内共生体,这与迄今为止筛选出的所有其他曼氏菌物种一致。
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