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Molecular phylogeographic studies on Paragonimus westermani in Asia

Published online by Cambridge University Press:  22 February 2007

M. Iwagami
Affiliation:
Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro City, Hokkaido, 080–8555, Japan Department of Environmental Health Science, Kochi Medical School, Oko, Nankoku City, Kochi 783–8505, Japan
L.Y. Ho
Affiliation:
People's Hospital, Beijing Medical University, Beijing 100034, China
K. Su
Affiliation:
Department of Parasitology, College of Medicine, National Taiwan University, Taipei, Taiwan
P.F. Lai
Affiliation:
Department of Parasitology, Institute for Medical Research, Kuala Lumpur, Malaysia
M. Fukushima
Affiliation:
Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro City, Hokkaido, 080–8555, Japan
M. Nakano
Affiliation:
Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro City, Hokkaido, 080–8555, Japan
D. Blair
Affiliation:
Department of Zoology and Tropical Ecology, James Cook University, Townsville, Queensland 4811, Australia
K. Kawashima
Affiliation:
School of Health Sciences, Kyusyu University, Fukuoka 812–8582, Japan
T. Agatsuma
Affiliation:
Department of Environmental Health Science, Kochi Medical School, Oko, Nankoku City, Kochi 783–8505, Japan
Corresponding

Abstract

The lung fluke, Paragonimus westermani (Kerbert, 1878), is widely distributed in Asia, and exhibits much variation in its biological properties. Previous phylogenetic studies using DNA sequences have demonstrated that samples from north-east Asia form a tight group distinct from samples from south Asia (Philippines, Thailand, Malaysia). Among countries from the latter region, considerable molecular diversity was observed. This was investigated further using additional DNA sequences (partial mitochondrial cytochrome c oxidase subunit 1 (COI) and the second internal transcribed spacer of the nuclear ribosomal gene repeat (ITS2)) from additional samples of P. westermani. Phylogenies inferred from these again found three or four groups within P. westermani, depending on the method of analysis. Populations of P. westermani from north-east Asia use snail hosts of the family Pleuroceridae and differ in other biological properties from populations in south Asia (that use snail hosts of the family Thiaridae). It is considered that the populations we sampled can be divided into two species, one in north-east Asia and the other in south Asia.

Type
Research Article
Copyright
Cambridge University Press 2000

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References

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