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BIBTEX RIS

Implementation of new tools in molecular epidemiology studies of Echinococcus granulosus sensu lato in South America

2017; Elsevier BV; Volume: 66; Issue: 3 Linguagem: Inglês

10.1016/j.parint.2017.02.001

1873-0329

Héctor Gabriel Ávila, Guilherme Brzoskowski dos Santos, Marcela Cucher, Natalia Macchiaroli, Matías Gastón Pérez, Germán Baldi, Oscar Jensen, Verónica Mirtha Pérez, Raúl A. López, Perla Negro, Exequiel Alejandro Scialfa, Arnaldo Zaha, Henrique Bunselmeyer Ferreira, Mara Cecília Rosenzvit, Laura Kamenetzky,

Parasitic Infections and Diagnostics

The aim of this work was to determine Echinococcus granulosus sensu lato species and genotypes in intermediate and definitive hosts and in human isolates from endemic regions of Argentina and Brazil including those where no molecular data is available by a combination of classical and alternative molecular tools. A total of 227 samples were isolated from humans, natural intermediate and definitive hosts. Amplification of cytochrome c oxidase subunit I gene fragment was performed and a combination of AluI digestion assay, High Resolution Melting analysis (HRM) assay and DNA sequencing was implemented for Echinococcus species/genotype determination. E. granulosus sensu stricto (G1) was found in sheep (n = 35), cattle (n = 67) and dogs (n = 5); E. ortleppi (G5) in humans (n = 3) and cattle (n = 108); E. canadensis (G6) in humans (n = 2) and E. canadensis (G7) in pigs (n = 7). We reported for the first time the presence of E. ortleppi (G5) and E. canadensis (G6) in humans from San Juan and Catamarca Argentinean provinces and E. canadensis (G7) in pigs from Cordoba Argentinean province. In this work, we widened molecular epidemiology studies of E. granulosus s. l. in South America by analyzing several isolates from definitive and intermediate hosts, including humans from endemic regions were such information was scarce or unavailable. The presence of different species/genotypes in the same region and host species reinforce the need of rapid and specific techniques for accurate determination of Echinococcus species such as the ones proposed in this work.