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Contribución al conocimiento de los reservorios del Trypanosoma cruzi (Chagas,1909) en la Provincia de Corrientes, Argentina Contribution to knowledge of reservoirs of Trypanosoma cruzi (Chagas, 1909) in Corrientes Province, Argentina

By María Esther Bar, Benedicta Mabel Alvarez, Elena Beatriz Oscherov, Miryam Pieri Damborsky and Miguel Eduardo Jörg

Abstract

Con el propósito de identificar a reservorios del Trypanosoma cruzi se investigaron 60 mamíferos en los Departamentos Capital y San Luis del Palmar. Se examinaron: primates, roedores, marsupiales, carnívoros y edentados; 40 vivían en cautiverio y 20 fueron capturados mediante trampas en una comunidad rural forestal. Los mamíferos fueron analizados por xenodiagnóstico, empleándose ninfas de 3o o 4o estadío de Triatoma infestans ayunadas durante 2 semanas. Las heces de los triatominos fueron observadas al microscopio (400x) a los 30, 60 y 90 días post-alimentación. En 2 Saimiri sciureus y en 1 Cebus apella se constató infección por tripanosomas cruziformes. Se concluye que la parasitemia detectada fue baja. La presencia de Didelphis albiventris, reservorio potencial del Trypanosoma cruzi , en una zona de transmisión activa del parásito representa un factor de riesgo, por lo que son necesarias futuras investigaciones epidemiológicas para determinar la real diagnosis de esta parasitosis en la provincia de Corrientes, Argentina.<br>In order to identify Trypanosoma cruzi reservoirs in transmission areas, 60 mammals in Capital and San Luis del Palmar Departments, Corrientes, Argentina were studied. Primates, rodents, carnivores, marsupials and edentates were investigated, 40 of them living in captivity and 20 caught with traps in a rural area. The mammals were examined by xenodiagnosis and third or fourth instars nymphs of Triatoma infestans starved for 2 weeks were used. The feces were microscopically observed (400x) for Trypanosoma cruzi infection at 30, 60 and 90 days after feeding. Trypanosoma cruzi-like parasites were identified in 2 Saimiri sciureus and 1 Cebus apella analyzed by xenodiagnosis. It was concluded that parasitemia was low. Howewer, the presence in a forest area of Didelphis albiventris, potential reservoir of the parasite, indicates a risk factor and deserves further epidemiological study for a true diagnosis of this endemic infection

Topics: Mamíferos reservorios, Trypanosoma cruzi, Xenodiagnóstico, Corrientes, Reservoir mammals, Trypanosoma cruzi, Xenodiagnosis, Corrientes, Medicine (General), R5-920, Medicine, R, DOAJ:Medicine (General), DOAJ:Health Sciences, Arctic medicine. Tropical medicine, RC955-962
Publisher: Sociedade Brasileira de Medicina Tropical (SBMT)
Year: 1999
DOI identifier: 10.1590/S0037-86821999000300008
OAI identifier: oai:doaj.org/article:519be286faae4a4bbb4c56c88a1db0c5
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