Genetic variability and haplotypes of Echinococcus isolates from Tunisia

Boufana, BS, Lahmar, S, Rebai, W, Ben Safta, Z, Jebabli, L, Ammar, A, Kachti, M, Aouadi, S and Craig, PS 2014, 'Genetic variability and haplotypes of Echinococcus isolates from Tunisia' , Transactions of the Royal Society of Tropical Medicine & Hygiene, 108 (11) , pp. 706-714.

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Background: The species/genotypes of Echinococcus infecting a range of intermediate, canid and human hosts were examined as well as the intraspecific variation and population structure of Echinococcus granulosus sensu lato (s.l.) within these hosts. Methods: A total of 174 Echinococcus isolates from humans and ungulate intermediate hosts and adult tapeworms from dogs and jackals were used. Genomic DNA was used to amplify a fragment within a mitochondrial gene and a nuclear gene, coding for cytochrome c oxidase subunit 1 (cox1; 828 bp) and elongation factor 1-alpha (ef1a; 656 bp), respectively. Results: E. granulosus sensu strictowas identified fromall host species examined, E. canadensis (G6) in a camel and, for the first time, fertile cysts of E. granulosus (s.s.) and E. equinus in equids (donkeys) and E. granulosus (s.s.) fromwild boars and goats. Considerable genetic variation was seen only for the cox1 sequences of E. granulosus (s.s.). The pairwise fixation index (Fst) for cox1 E. granulosus (s.s.) sequences fromdonkeyswas high andwas statistically significant comparedwith that of E. granulosus populations fromother intermediate hosts. A single haplotype (EqTu01) was identified for the cox1 nucleotide sequences of E. equinus. Conclusions: The role of donkeys in the epidemiology of echinococcosis in Tunisia requires further investigation.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Transactions of the Royal Society of Tropical Medicine & Hygiene
Publisher: Oxford University Press
ISSN: 0035-9203
Depositing User: USIR Admin
Date Deposited: 19 Oct 2016 09:21
Last Modified: 27 Aug 2021 20:32

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