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Abstract:

The Reduviid bugs Triatoma garciabesi Carcavallo et al. (Hemiptera: Reduviidae: Triatominae), previously known as T. sordida Stahl in the semi-arid chaco region, and T. guasayana Wygodzinsky and Abalos, vectors of Trypanosoma cruzi Chagas (Kinetoplastida: Trypanosomatidae), were found to occupy wide but different ranges of ecotopes in the peridomestic environment. At Amama and nearby rural villages in north-western Argentina, a combined total of 1233 specimens were collected from 325/2314 (14%) sites surveyed at 6-monthly intervals from November 1994 to November 1996. Triatoma garciabesi and T. guasayana displayed a significantly different distribution among peridomestic ecotopes. Triatoma garciabesi predominated over T. guasayana in the prevalence of infested sites, the number of colonies and the number of bugs collected. For T. garciabesi, the predominant ecotopes most likely to yield T. garciabesi repeatedly were the rugged bark of Prosopis alba or P. nigra (Fabaceae) trees, where chickens roosted, and chicken coops. For T. guasayana the main ecotopes were goat or sheep corrals, piled materials and orchard fences. Triatoma garciabesi and T. guasayana were collected concurrently from the same site on 9/2314 (0.4%) occasions, and on different dates at the same site on 12 (0.5%) occasions. The observed low frequency of mixed populations (<1%) was not significantly different from that expected from a hypothesis of independence. Triatoma garciabesi clearly outnumbered T. guasayana in four of the nine mixed populations, none of which persisted as such. Neither T. garciabesi nor T. guasayana colonized human habitations, even in the absence of T. infestans (formerly the predominant domestic vector of T. cruzi in this area), a situation that apparently has not changed in the last 50 years in northern Argentina.

Registro:

Documento: Artículo
Título:Peridomestic distribution of Triatoma garciabesi and Triatoma guasayana in north-west Argentina
Autor:Canale, D.M.; Cecere, M.C.; Chuit, R.; Gürtler, R.E.
Filiación:Servicio Nacional de Chagas, Centro de Reservorios y Vectores, Córdoba, Argentina
Departmento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Centro de Investigaciones Epidemiológicas, Academia Nacional de Medicina de Buenos Aires, Buenos Aires, Argentina
Laboratorio de Ecología General, Departamento de Ciencias Biológicas, Ciudad Universitaria (C1428EHA), Buenos Aires, Argentina
Palabras clave:Argentina; Chagas disease; Coexistence; Segregation; T. guasayana; T. sordida; Triatoma garciabesi; Trypanosoma cruzi; Vector control; disease vector; geographical distribution; habitat type; trypanosomiasis; (Northwest); Argentina; Animalia; Capra hircus; Chaco; Fabaceae; Gallus gallus; Hemiptera; Heteroptera; Heteroptera; Kinetoplastida; Ovis aries; Prosopis alba; Prosopis alba; Prosopis nigra; Prosopis nigra; Reduviidae; Reduviidae; Triatoma garciabesi; Triatoma garciabesi; Triatoma guasayana; Triatoma guasayana; Triatoma infestans; Triatoma infestans; Triatoma sordida; Triatoma sordida; Triatominae; Trypanosoma; Trypanosoma cruzi; Trypanosoma cruzi; Trypanosomatidae
Año:2000
Volumen:14
Número:4
Página de inicio:383
Página de fin:390
DOI: http://dx.doi.org/10.1046/j.1365-2915.2000.00254.x
Título revista:Medical and Veterinary Entomology
Título revista abreviado:Med. Vet. Entomol.
ISSN:0269283X
CODEN:MVENE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0269283X_v14_n4_p383_Canale

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Citas:

---------- APA ----------
Canale, D.M., Cecere, M.C., Chuit, R. & Gürtler, R.E. (2000) . Peridomestic distribution of Triatoma garciabesi and Triatoma guasayana in north-west Argentina. Medical and Veterinary Entomology, 14(4), 383-390.
http://dx.doi.org/10.1046/j.1365-2915.2000.00254.x
---------- CHICAGO ----------
Canale, D.M., Cecere, M.C., Chuit, R., Gürtler, R.E. "Peridomestic distribution of Triatoma garciabesi and Triatoma guasayana in north-west Argentina" . Medical and Veterinary Entomology 14, no. 4 (2000) : 383-390.
http://dx.doi.org/10.1046/j.1365-2915.2000.00254.x
---------- MLA ----------
Canale, D.M., Cecere, M.C., Chuit, R., Gürtler, R.E. "Peridomestic distribution of Triatoma garciabesi and Triatoma guasayana in north-west Argentina" . Medical and Veterinary Entomology, vol. 14, no. 4, 2000, pp. 383-390.
http://dx.doi.org/10.1046/j.1365-2915.2000.00254.x
---------- VANCOUVER ----------
Canale, D.M., Cecere, M.C., Chuit, R., Gürtler, R.E. Peridomestic distribution of Triatoma garciabesi and Triatoma guasayana in north-west Argentina. Med. Vet. Entomol. 2000;14(4):383-390.
http://dx.doi.org/10.1046/j.1365-2915.2000.00254.x