alexa Genetic classification of Echinococcus granulosus cysts from humans, cattle and camels in Libya using mutation scanning-based analysis of mitochondrial loci.
Veterinary Sciences

Veterinary Sciences

Journal of Veterinary Science & Technology

Author(s): Abushhewa MH, Abushhiwa MH, Nolan MJ, Jex AR, Campbell BE,

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Abstract We genetically classified Echinococcus granulosus from humans, cattle and camels in Libya utilizing DNA regions (designated pcox1 and pnad1) within the cytochrome c oxidase subunit 1 (cox1) and NADH dehydrogenase 1 (nad1) mitochondrial genes, respectively. Polymerase chain reaction (PCR)-based single-strand conformation polymorphism (SSCP) analysis of pcox1 and pnad1 amplicons derived from genomic DNA samples from individual cysts (n = 176) revealed four distinct electrophoretic profiles for each locus. Direct sequencing of selected amplicons representing each of these profiles defined four different sequence types for each locus, which were present in five different combinations (designated haplotypes A-E) amongst all 176 isolates. Phylogenetic analysis of concatenated sequence data for these five haplotypes, together with a range of well-defined reference sequences, inferred that all cyst isolates from humans (n = 55) and a small number from cattle (13\% of 38) belonged to the G1-G3 complex of E. granulosus (or E. granulosus sensu stricto), whereas most (87\%) cysts from cattle and all 83 of them from camels were linked to the G6-G10 complex (or Echinococcus canadensis). The present study provides a foundation for future large-scale studies of the epidemiology and ecology of E. granulosus in Libya and other African countries. Copyright © 2010 Elsevier Ltd. All rights reserved. This article was published in Mol Cell Probes and referenced in Journal of Veterinary Science & Technology

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