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Molecular phylogenetic position of Schistosoma sinensium in the genus Schistosoma

Published online by Cambridge University Press:  12 April 2024

T. Agatsuma*
Affiliation:
Department of Environmental Health Science
M. Iwagami
Affiliation:
Department of Environmental Health Science
C.X. Liu*
Affiliation:
Department of Physiology, Faculty of Medicine, Kochi Medical School, Oko, Nankoku City, Kochi 783-8505, Japan
Y. Saitoh
Affiliation:
Department of Parasitology, Faculty of Veterinary Medicine, Azabu University, Kanagawa, Japan
M. Kawanaka
Affiliation:
Department of Parasitology, National Institute of Infectious Diseases, Tokyo, Japan
S. Upatham
Affiliation:
Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand
D. Qui
Affiliation:
epartment of Schistosomiasis, Sichuan Institute of Parasitic Diseases, Chendu, China
T. Higuchi*
Affiliation:
Department of Physiology, Faculty of Medicine, Kochi Medical School, Oko, Nankoku City, Kochi 783-8505, Japan
*
*Fax: +81 88 880 2535 E-mail: agatsuma@med.kochi-ms.ac.jp
Present address: Department of Physiology, Faculty of Medicine, Fukui Medical University, Matsuoka, Fukui 910-1193, Japan
Present address: Department of Physiology, Faculty of Medicine, Fukui Medical University, Matsuoka, Fukui 910-1193, Japan
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Abstract

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The status of Schistosoma sinensium (samples from Thailand and from Sichuan, China) relative to other species of the genus Schistosoma was investigated using DNA sequences from the mitochondrial cytochrome c oxidase subunit 1 (CO1) gene (partial) and the nuclear ribosomal DNA second internal transcribed spacer 2 (ITS2). Trees inferred from these sequences place S. sinensium as sister to the S. japonicum group and suggest a basal position in the clade utilizing snails of the family Pomatiopsidae. The sequence differences between specimens of S. sinensium from China and Thailand are at least as great as between S. malayensis and S. mekongi. Schistosoma sinensium is probably best regarded as a species complex.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2001

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