期刊
PARASITOLOGY INTERNATIONAL
卷 80, 期 -, 页码 -出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.parint.2020.102181
关键词
Spirometra species; Spirometra mansoni; Asia; Genetic diversity; Mitochondrial cytochrome c oxidase subunit 1 gene; Human sparganosis
类别
资金
- Japan Agency for Medical Research and Development [15fk0108025h0502, 16fk0108309j0103]
- Distinguished Research Professor Grant, Thailand Research Fund [DPG 6280002]
- Faculty of Medicine, Khon Kaen University [DR63101]
- Doctoral Training Program of the Graduate School and Research Affairs, Khon Kaen University [60164]
A study revealed the presence of two distinct Spirometra species in Asia, Type I and Type II, which are not closely related to European S. erinaceieuropaei, with Type II potentially representing an undescribed species.
Despite considerable controversy concerning the taxonomy of species within the genus Spirometra, human sparganosis and spirometrosis mainly in Asia and Europe has long been confidently ascribed to Spirometra erinaceieuropaei. Recently, the mitochondrial genomes of purported S. erinaceieuropaei, Spirometra decipiens and Spirometra ranarum from Asia have been determined. However, it has been pointed out that the morphological criteria used for identifying these species are unsuitable and thus these identifications are questionable. In the present study, therefore, Spirometra samples from Asia were re-examined based on mitochondrial cytochrome c oxidase subunit 1 gene sequences and the identification of these species was discussed. Haplotype network and phylogenetic analyses revealed that: i) two distinct Spirometra species, Type I and Type II, are present in Asia and neither of which is close to likely European S. erinaceieuropaei; ii) Type I is genetically diverse and widely distributed, however Type II is known so far from Japan and Korea; iii) S. decipiens and S. ranarum reported from Asia are conspecific with Type I; iv) Type I is probably conspecific with Spirometra mansoni, and Type II may represent an undescribed species.
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