Morphological differences and molecular similarities between Paragonimus bangkokensis and P. harinasutai
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Abstract
Paragonimus bangkokensis and Paragonimus harinasutai were found one after another in the same crab host, Potamon smithianus, in Thailand in 1967 and 1968. Both species were also recently found in China and Lao People's Democratic Republic (PDR). Those two Paragonimus spp. are distinguishable from each other by morphological features of metacercariae and adults. However, recently, the DNA sequences of second internal transcribed spacer region (ITS2) and cytochrome oxidase subunit 1 (CO1) genes of those two species in Thailand were reported to be highly similar to each other. In the present study, we collected P. bangkokensis in two provinces in Vietnam (the first record in Vietnam) and both P. bangkokensis and P. harinasutai in Lao PDR for the morphological and molecular phylogenetic analyses to clarify the mutual relationship between the two species. The results show that P. bangkokensis and P. harinasutai were distinguishable from each other by morphology such as the size of metacercariae and the arrangement of cuticular spines of adult worms. However, the molecular phylogenetic analyses of ITS2 and CO1 genes clearly indicate that P. bangkokensis and P. harinasutai make a monophyletic group.
Keywords
Adult Worm Indochina Peninsula Chinese Isolate Cuticular Spine Likelihood Base TestNotes
Acknowledgements
This study was partially supported by the Japanese Society for Promotion of Science (JSPS) under Ronpaku Fellowship no. NCST-10430 for Pham Ngoc Doanh, and by the Project for Zoonosis Education and Research, University of Miyazaki.
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