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Genetic Diversity and Phylogeography of the Elusive, But Epidemiologically Important Echinococcus Granulosus Sensu Stricto Genotype G3 Publisher Pubmed



Kinkar L1 ; Laurimae T1 ; Balkaya I2 ; Casulli A3 ; Zait H4 ; Irshadullah M5 ; Sharbatkhori M6 ; Mirhendi H7 ; Rostaminejad M8 ; Poncegordo F9 ; Rehbein S10 ; Kia EB11 ; Simsek S12 ; Snabel V13 Show All Authors
Authors
  1. Kinkar L1
  2. Laurimae T1
  3. Balkaya I2
  4. Casulli A3
  5. Zait H4
  6. Irshadullah M5
  7. Sharbatkhori M6
  8. Mirhendi H7
  9. Rostaminejad M8
  10. Poncegordo F9
  11. Rehbein S10
  12. Kia EB11
  13. Simsek S12
  14. Snabel V13
  15. Umhang G14
  16. Varcasia A15
  17. Saarma U1

Source: Parasitology Published:2018


Abstract

Cystic echinococcosis (CE) is a severe parasitic disease caused by the species complex Echinococcus granulosus sensu lato. Human infections are most commonly associated with E. granulosus sensu stricto (s.s.), comprising genotypes G1 and G3. The objective of the current study was to provide first insight into the genetic diversity and phylogeography of genotype G3. Despite the epidemiological importance of the genotype, it has remained poorly explored due to the ambiguity in the definition of the genotype. However, it was recently demonstrated that long sequences of mitochondrial DNA (mtDNA) provide a reliable method to discriminate G1 and G3 from each other. Therefore, we sequenced near-complete mtDNA of 39 G3 samples, covering most of the known distribution range and host spectra of the genotype. The phylogenetic network revealed high genetic variation within E. granulosus s.s. G3 and while G3 is significantly less prevalent worldwide than G1, the genetic diversity of both of the genotypes is equally high. We also present the results of the Bayesian phylogeographic analysis, which yielded several well-supported diffusion routes of genotype G3 originating from Turkey and Iran, suggesting the Middle East as the origin of the genotype. Copyright © Cambridge University Press 2018.
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