Artículo
Trypanosoma cruzi diversity in the Gran Chaco: Mixed infections and differential host distribution of TcV and TcVI
Monje Rumi, Maria Mercedes
; Perez Brandan, Cecilia Maria
; Ragone, Paula Gabriela
; Tomasini, Nicolás
; Lauthier, Juan José
; Alberti D'Amato, Anahi M.; Cimino, Ruben O.; Orellana, Viviana; Basombrio, Miguel Angel Manuel
; Diosque, Patricio
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Fecha de publicación:
01/2015
Editorial:
Elsevier Science
Revista:
Infection, Genetics And Evolution
ISSN:
1567-1348
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The transmission cycles of Trypanosoma cruzi in the Gran Chaco are complex networks involving domestic and wild components, whose interrelationships are not well understood. Knowing the circuit of transmission of the different Discrete Typing Units (DTUs) of T. cruzi in the complex environment of the Chaco region is relevant to understanding how the different components (reservoirs, vectors, ecotopes) interact. In the present study we identified the DTUs infecting humans and dogs in two rural areas of the Gran Chaco in Argentina, using molecular methods which avoid parasite culture. Blood samples of humans and dogs were typified by PCR-DNA blotting and hybridization assays with five specific DNA probes (TcI, TcII, TcIII, TcV and TcVI). PCR analyses were performed on seropositive human and dog samples and showed the presence of T. cruzi DNA in 41.7% (98/235) and 53% (35/66) samples, respectively. The identification of infective DTUs was determined in 83.6% (82/98) and 91.4% (32/35) in human and dog samples, respectively. Single infections (36.7% – 36/98) and a previously not detected high proportion of mixed infections (47.9% – 47/98) were found. In a 15.3% (15/98) of samples the infecting DTU was not identified. Among the single infections TcV was the most prevalent DTU (30.6% – 30/98) in human samples; while TcVI (42.8% – 15/35) showed the highest prevalence in dog samples. TcV/TcVI was the most prevalent mixed infection in humans (32.6% – 32/98); and TcI/TcVI (14.3% – 5/35) in dogs. Significant associations between TcV with humans and TcVI with dogs were detected. For the first time, the presence of TcIII was detected in humans from this region. The occurrence of one human infected whit TcIII (a principally wild DTU) could be suggested the emergence of this, in domestic cycles in the Gran Chaco.
Palabras clave:
Domestic Cycle
,
Prevalence
,
Pcr
,
Hybridization
,
Argentina
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Identificadores
Colecciones
Articulos(CCT - SALTA-JUJUY)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SALTA-JUJUY
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SALTA-JUJUY
Articulos(IPE)
Articulos de INST.DE PATOLOGIA EXPERIMENTAL
Articulos de INST.DE PATOLOGIA EXPERIMENTAL
Citación
Monje Rumi, Maria Mercedes; Perez Brandan, Cecilia Maria; Ragone, Paula Gabriela; Tomasini, Nicolás; Lauthier, Juan José; et al.; Trypanosoma cruzi diversity in the Gran Chaco: Mixed infections and differential host distribution of TcV and TcVI; Elsevier Science; Infection, Genetics And Evolution; 29; 1-2015; 53-59
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