title: Genetic diversity of Taenia asiatica from Thailand and other geographical locations as revealed by cytochrome c oxidase subunit 1 sequences.
abstract: Twelve 924 bp cytochrome c oxidase subunit 1 (cox1) mitochondrial DNA sequences from Taenia asiatica isolates from Thailand were aligned and compared with multiple sequence isolates from Thailand and 6 other countries from the GenBank database. The genetic divergence of T. asiatica was also compared with Taenia saginata database sequences from 6 different countries in Asia, including Thailand, and 3 countries from other continents. The results showed that there were minor genetic variations within T. asiatica species, while high intraspecies variation was found in T. saginata. There were only 2 haplotypes and 1 polymorphic site found in T. asiatica, but 8 haplotypes and 9 polymorphic sites in T. saginata. Haplotype diversity was very low, 0.067, in T. asiatica and high, 0.700, in T. saginata. The very low genetic diversity suggested that T. asiatica may be at a risk due to the loss of potential adaptive alleles, resulting in reduced viability and decreased responses to environmental changes, which may endanger the species.
authors: Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Thailand. tmmtr@mahidol.ac.th
authors: Malinee Thairungroj
authors: MT
authors: Anantaphruti
authors: Urusa
authors: U
authors: Thaenkham
authors: Dorn
authors: D
authors: Watthanakulpanich
authors: Orawan
authors: O
authors: Phuphisut
authors: Wanna
authors: W
authors: Maipanich
authors: Tippayarat
authors: T
authors: Yoonuan
authors: Supaporn
authors: S
authors: Nuamtanong
authors: Somjit
authors: S
authors: Pubampen
authors: Surapol
authors: S
authors: Sanguankiat
mesh_terms: D000818:Animals; D001208:Asia / Q000453:epidemiology; D016000:Cluster Analysis; D003576:Electron Transport Complex IV / Q000235:genetics*; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D008969:Molecular Sequence Data; D058974:Phylogeography; D021122:Protein Subunits / Q000235:genetics; D017422:Sequence Analysis, DNA; D013621:Taenia / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D013622:Taeniasis / Q000453:epidemiology* / Q000469:parasitology*
chemical_list: D021122:Protein Subunits; D003576:Electron Transport Complex IV
keywords: Taenia asiatica; Taenia saginata; Thailand; cox1 gene; different geographical location; genetic diversity