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Título : | Distribution and pathogenicity of Trypanosoma cruzi isolated from peridomestic populations of Triatoma infestans and Triatoma guasayana from rural Western Argentina | Autor : | Lauricella, Marta A. Stariolo, Raúl L. Gürtler, Ricardo E. Segura, Elsa L. Riarte, Adelina |
Palabras clave : | Enfermedad de Chagas;Trypanosoma cruzi;Triatoma;Virulencia;Argentina | Fecha de publicación : | 2005 | Descripción : | We assessed the distribution of Trypanosoma cruzi infection in peridomestic triatomines collected manually at a district-wide scale in rural villages around Olta, Western Argentina, and typed the isolated strains according to their pathogenicity to laboratory mice. Of 1623 triatomines examined, only 14 (0.9%) were infected with T. cruzi based on microscopical examination of feces. The prevalence of T. cruziinfection was 0.8% in Triatoma infestans, 2.3% in T. guasayana, and nil in T. garciabesi, T. platensis, and T. eratyrusiformis. Local transmission occurred in kitchens, store-rooms and goat corrals or nearby, though at very low levels. T. cruzi was detected by at least one parasitological method in 11 (79%) of 14 microscope-positive bugs. Hemoculture was the most sensitive method (67%) followed by culture of organ homogenates, histopathology or xenodiagnosis of inoculated suckling mice (55-58%), and culture of microscope-positive bug feces (46%). The evidence suggests that most of the isolated T. cruzistrains would be myotropic type III. Our study establishes for the first time that peridomestic, microscope-positive T. guasayananymphs were actually infected with T. cruzi, and may be implicated as a putative secondary vector of T. cruziin domestic or peridomestic sites. Fil: Lauricella, Marta A. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Parasitología Dr. Mario Fatala Chaben; Argentina. Fil: Stariolo, Raúl L. Coordinación Nacional de Control de Vectores; Argentina. Fil: Segura, Elsa Leonor. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Parasitología Dr. Mario Fatala Chaben; Argentina. Fil: Riarte, Adelina Rosa. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Parasitología Dr. Mario Fatala Chaben; Argentina. Fil: Gürtler, Ricardo E. Universidad de Buenos Aires. Laboratorio de Eco-Epidemiología; Argentina. |
URI : | http://sgc.anlis.gob.ar/handle/123456789/286 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3076212/pdf/nihms-74939.pdf |
ISSN : | 0074-0276 | Derechos: | info:eu-repo/semantics/openAccess |
Aparece en las colecciones: | snrd Publicaciones INP |
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MemóriasdoInstitutoOswaldoCruz,2005,100(2),123–129..pdf | 77.15 kB | Adobe PDF | Visualizar/Abrir |
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