Abstract:
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 offeces. The prevalence of T. cruzi infection 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. cruzi strains would be myotropic type III. Our study establishes for the first time that peridomestic, microscope-positive T. guasayana nymphs were actually infected with T. cruzi, and may be implicated as a putative secondary vector of T. cruzi in domestic or peridomestic sites.
Registro:
Documento: |
Artículo
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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, M.A.; Stariolo, R.L.; Riarte, A.R.; Segura, E.L.; Gürtler, R.E. |
Filiación: | Instituto Nacional de Parasitologia Dr. Mario Fatala Chaben-A.N.L.I.S. Dr. Carlos G. Malbran, Av. Paseo Colón 568, 1063 Buenos Aires, Argentina Coordinación Nacional de Control de Vectores, 5000 Córdoba, Argentina Laboratorio de Eco-Epidemiología, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
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Palabras clave: | Argentina; Chagas disease; Pathogenicity; Surveillance; Triatoma garciabesi; Triatoma guasayana; Triatoma infestans; Trypanosoma cruzi; Argentina; article; blood culture; feces analysis; histopathology; homogenate; kitchen; microscopy; mouse; nonhuman; parasite isolation; parasite transmission; pathogenicity; sensitivity analysis; Triatoma; Triatoma infestans; Trypanosoma cruzi; xenodiagnosis; Capra hircus; Triatoma eratyrusiformis; Triatoma garciabesi; Triatoma guasayana; Triatoma infestans; Triatoma platensis; Trypanosoma; Trypanosoma cruzi |
Año: | 2005
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Volumen: | 100
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Número: | 2
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Página de inicio: | 123
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Página de fin: | 129
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DOI: |
http://dx.doi.org/10.1590/S0074-02762005000200004 |
Título revista: | Memorias do Instituto Oswaldo Cruz
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Título revista abreviado: | Mem. Inst. Oswaldo Cruz
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ISSN: | 00740276
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v100_n2_p123_Lauricella |
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Citas:
---------- APA ----------
Lauricella, M.A., Stariolo, R.L., Riarte, A.R., Segura, E.L. & Gürtler, R.E.
(2005)
. Distribution and pathogenicity of Trypanosoma cruzi isolated from peridomestic populations of Triatoma infestans and Triatoma guasayana from rural Western Argentina. Memorias do Instituto Oswaldo Cruz, 100(2), 123-129.
http://dx.doi.org/10.1590/S0074-02762005000200004---------- CHICAGO ----------
Lauricella, M.A., Stariolo, R.L., Riarte, A.R., Segura, E.L., Gürtler, R.E.
"Distribution and pathogenicity of Trypanosoma cruzi isolated from peridomestic populations of Triatoma infestans and Triatoma guasayana from rural Western Argentina"
. Memorias do Instituto Oswaldo Cruz 100, no. 2
(2005) : 123-129.
http://dx.doi.org/10.1590/S0074-02762005000200004---------- MLA ----------
Lauricella, M.A., Stariolo, R.L., Riarte, A.R., Segura, E.L., Gürtler, R.E.
"Distribution and pathogenicity of Trypanosoma cruzi isolated from peridomestic populations of Triatoma infestans and Triatoma guasayana from rural Western Argentina"
. Memorias do Instituto Oswaldo Cruz, vol. 100, no. 2, 2005, pp. 123-129.
http://dx.doi.org/10.1590/S0074-02762005000200004---------- VANCOUVER ----------
Lauricella, M.A., Stariolo, R.L., Riarte, A.R., Segura, E.L., Gürtler, R.E. Distribution and pathogenicity of Trypanosoma cruzi isolated from peridomestic populations of Triatoma infestans and Triatoma guasayana from rural Western Argentina. Mem. Inst. Oswaldo Cruz. 2005;100(2):123-129.
http://dx.doi.org/10.1590/S0074-02762005000200004