Please use this identifier to cite or link to this item:
|Title:||Distribution and pathogenicity of Trypanosoma cruzi isolated from peridomestic populations of Triatoma infestans and Triatoma guasayana from rural Western Argentina||Authors:||Lauricella, Marta A.
Stariolo, Raúl L.
Gürtler, Ricardo E.
Segura, Elsa L.
|Keywords:||Enfermedad de Chagas;Trypanosoma cruzi;Triatoma;Virulencia;Argentina||Issue Date:||2005||Description:||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.
|Appears in Collections:||Publicaciones INP|
Show full item record
Files in This Item:
|MemóriasdoInstitutoOswaldoCruz,2005,100(2),123–129..pdf||77.15 kB||Adobe PDF|
checked on Sep 19, 2019
checked on Sep 19, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.