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Genetic differences among Vietnamese Haplorchis taichui populations using the COI genetic marker

Published online by Cambridge University Press:  06 February 2012

D.T. Dung ,
N.T. Hop ,
U. Thaenkham  and
J. Waikagul
D.T. Dung
Affiliation:
Department of Parasitology, National Institute of Malariology, Parasitology and Entomology, Hanoi, Vietnam
N.T. Hop
Affiliation:
Department of Parasitology, National Institute of Malariology, Parasitology and Entomology, Hanoi, Vietnam
U. Thaenkham
Affiliation:
Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok10400, Thailand
J. Waikagul*
Affiliation:
Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok10400, Thailand
*
* Fax: +662 643 5600, E-mail: [email protected]
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Abstract

Adults of the fish-borne intestinal trematode species Haplorchis taichui were collected from humans in three provinces of Vietnam: Ha Giang, Thanh Hoa and Quang Tri. Genetic analysis revealed three groups of the parasite from clustering dendrograms, correlating with the localities in which they were collected. Measurements of evolutionary divergence over sequence pairs were greater between the different populations than within them, which indicated that the three populations were genetically different. The significance (Fst= 0.73; P value < 0.05) of the genetic variation of the three studied populations implied that genetic separation of the populations had already occurred, which may have been caused by a low gene flow among the different H. taichui populations. Factors contributing to the low gene flow may include isolation resulting from the intermediate-host fish rarely being sold outside of the rural commune where they are raised and the enclosed aquacultural areas themselves.

Type
Research Papers
Information
Journal of Helminthology , Volume 87 , Issue 1 , March 2013 , pp. 66 - 70
Copyright
Copyright © Cambridge University Press 2012

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