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Geographical genetic structure within the human lung fluke, Paragonimus westermani, detected from DNA sequences

Published online by Cambridge University Press:  01 October 1997

D. BLAIR ,
T. AGATSUMA ,
T. WATANOBE ,
M. OKAMOTO  and
A. ITO
D. BLAIR
Affiliation:
Department of Zoology and Tropical Ecology, James Cook University, Townsville, Qld 4811, Australia
T. AGATSUMA
Affiliation:
Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
T. WATANOBE
Affiliation:
Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
M. OKAMOTO
Affiliation:
The Institute of Experimental Animal Sciences, Osaka University Medical School, Suita, Osaka 565, Japan
A. ITO
Affiliation:
Department of Parasitology, Gifu University School of Medicine, Gifu 500, Japan
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Abstract

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Nucleotide sequences were obtained for the second internal transcribed spacer of the ribosomal gene repeat and for part of the mitochondrial cytochrome c oxidase subunit I gene from geographical isolates of Paragonimus westermani from Japan, China, Korea, Taiwan, the Philippines, peninsular Malaysia and Thailand. Sequences were obtained from several other species of Paragonimus for comparative purposes. Two groups were recognized within P. westermani: an NE group (China, Japan, Korea, Taiwan) which was relatively uniform and included both diploid and triploid forms, and a southern group (Malaysia, Thailand, Philippines), members of which were genetically distant from one another. According to both ITS2 and COI data, genetic distances among P. westermani isolates equalled or exceeded those between some distinct species of Paragonimus. The ITS2 sequences were conserved relative to COI sequences. Substitutions among the latter may be approaching saturation within the genus Paragonimus.

Keywords

genetic structuremitochondrial cytochrome c oxidase subunit IParagonimus westermaniphylogenetic treesnuclear ribosomal second internal transcribed spacer
Type
Research Article
Information
Parasitology , Volume 115 , Issue 4 , October 1997 , pp. 411 - 417
Copyright
1997 Cambridge University Press