Document Detail


Apparent dominance of the G1-G3 genetic cluster of Echinococcus granulosus strains in the central inland region of Portugal.
MedLine Citation:
PMID:  20727984     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Infection by the larval stage of the cestode Echinococcus granulosus causes a disease known as cystic echinococcosis or hydatidosis, which is one of the most widespread zoonotic infections of veterinary and medical importance. Numerous studies have shown that E. granulosus exists as a complex of strains differing in a wide variety of criteria. Ten distinct genotypes (G1-G10) have been identified with a potential impact on the pathology, epidemiology and the effect of the measures implemented for the control of hydatidosis. Our main objective was to carry out a preliminary analysis of the genotypes of E. granulosus circulating in the central inland region of Portugal. Parasite samples (hydatid cysts, n=27) were isolated from the liver and lung of sheep and cattle. The DNA extracted from protoscoleces isolated from the fertile cysts served as a template for the PCR amplification of the part of the mitochondrial cytochrome c oxidase subunit 1 (cox1), ATP synthase F0 subunit 6 (atp6) as well as the large (rrnL/16S) and small (rrnS/12S) ribosomal RNA genes. Similarity searches with homologous sequences in the databanks indicated a very high similarity with references assigned to the G1, G3 and/or G1-G3 complex of Echinococcus strains. Phylogenetic analysis (Bayesian approach) supported these observations, and confirmed the assignment of all the analyzed sequences to the G1-G3 genetic cluster.
Authors:
Sílvia Beato; Ricardo Parreira; Manuela Calado; Maria Amélia A Grácio
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-08-19
Journal Detail:
Title:  Parasitology international     Volume:  59     ISSN:  1873-0329     ISO Abbreviation:  Parasitol. Int.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-10-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9708549     Medline TA:  Parasitol Int     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  638-42     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Instituto de Higiene e Medicina Tropical (IHMT)/Universidade Nova de Lisboa (UNL), Rua da Junqueira 100, 1349-008 Lisboa, Portugal. silvia.beato@ihmt.unl.pt
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