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Spirometra species from Asia: Genetic diversity and taxonomic challenges.

Authors
  • Yamasaki, Hiroshi1
  • Sanpool, Oranuch2
  • Rodpai, Rutchanee2
  • Sadaow, Lakkhana2
  • Laummaunwai, Porntip2
  • Un, Mesa2
  • Thanchomnang, Tongjit3
  • Laymanivong, Sakhone4
  • Aung, Win Pa Pa5
  • Intapan, Pewpan M2
  • Maleewong, Wanchai6
  • 1 Department of Parasitology, National Institute of Infectious Diseases, Ministry of Health, Labour and Welfare, Tokyo 162-8640, Japan. Electronic address: [email protected] , (Japan)
  • 2 Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand. , (Thailand)
  • 3 Department of Parasitology, Faculty of Medicine, Mahasarakham University, Maha Sarakham 44000, Thailand; Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand. , (Thailand)
  • 4 Centre of Malariology, Parasitology and Entomology, Ministry of Health, Vientiane, Lao Democratic People's Republic.
  • 5 Department of Microbiology, University of Medicine 2, Yangon, Myanmar. , (Myanmar (Burma))
  • 6 Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address: [email protected] , (Thailand)
Type
Published Article
Journal
Parasitology international
Publication Date
Sep 05, 2020
Pages
102181–102181
Identifiers
DOI: 10.1016/j.parint.2020.102181
PMID: 32898662
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

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) Type I is probably conspecific with Spirometra mansoni, and Type II may represent an undescribed species; iv) "S. decipiens" and "S. ranarum" reported from Asia are conspecific with Type I. We propose that Type I is most probably S. mansoni and Type II is likely an undescribed species. Copyright © 2020. Published by Elsevier B.V.

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