New sylvatic hosts of Trypanosoma cruzi and reservoir competence in the humid Argentinean Chaco: A longitudinal study
A four-year longitudinal study was conducted to investigate the structure of sylvatic transmission cycles of Trypanosoma cruzi, assess reservoir host competence and identify parasite discrete typing units (DTUs) in a disturbed rural area of the humid Argentinean Chaco. Among 190 mammals examined by...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/4333 |
| Acceso en línea: | http://hdl.handle.net/11336/4333 |
| Access Level: | acceso abierto |
| Palabra clave: | Trypanosoma Cruzi Sylvatic Cycles Reservoir Host Competence Parasite Discrete Typing Units https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| Sumario: | A four-year longitudinal study was conducted to investigate the structure of sylvatic transmission cycles of Trypanosoma cruzi, assess reservoir host competence and identify parasite discrete typing units (DTUs) in a disturbed rural area of the humid Argentinean Chaco. Among 190 mammals examined by xenodiagnosis and polymerase chain reaction amplification, the composite prevalence of infection was substantially higher in Dasypus novemcinctus armadillos (57.7%) and Didelphis albiventris opossums (38.1%) than in Euphractus sexcinctus (20.0%), Tolypeutes matacus (12.5%) and Chaetophractus vellerosus (6.3%) armadillos. T. cruzi was detected for the first time in Thylamys pusilla opossums and in two unidentified small rodents. Infection was spatially aggregated only in armadillos. All Didelphis were infected with T. cruzi I and all armadillo species with T. cruzi III, implying two distinct sylvatic cycles with no inputs from the domestic cycle. Dasypus armadillos and Didelphis opossums were much more infectious to vectors than other armadillos, opossums or rodents. |
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