RESUMEN
In the Amazon Basin, Trypanosoma cruzi infection is enzootic, involving a variety of wild mammals and at least 10 of the 16 reported silvatic triatomine bug species. Human cases of Chagas disease are increasing, indicating that the disease may be emerging as a wider public health problem in the region: 38 cases from 1969 to 1992, and 167 in the past eight years. This article reviews the status of Chagas disease in Amazonian Brazil, including known reservoirs and vectors, and the genetic diversity of T. cruzi. At least three subspecific groups of T. cruzi-T. cruzilZ1, T. cruziZ3 and T. cruziZ3/Z1 ASAT--are present. It appears that T. cruzil has an extant capacity for genetic exchange. Attention is also drawn to the risk of domestic endemicity, in addition to the tasks facing the disease control authorities.
Asunto(s)
Enfermedad de Chagas/epidemiología , Enfermedades Transmisibles Emergentes/epidemiología , Trypanosoma cruzi/crecimiento & desarrollo , Animales , Brasil/epidemiología , Enfermedad de Chagas/prevención & control , Enfermedades Transmisibles Emergentes/prevención & control , Reservorios de Enfermedades , Humanos , Insectos Vectores/fisiología , Factores de Riesgo , Triatominae/fisiología , Trypanosoma cruzi/clasificación , Trypanosoma cruzi/genéticaRESUMEN
Large-scale trials of a trapping system designed to collect silvatic Triatominae are reported. Live-baited adhesive traps were tested in various ecosystems and different triatomine habitats (arboreal and terrestrial). The trials were always successful, with a rate of positive habitats generally over 20% and reaching 48.4% for palm trees of the Amazon basin. Eleven species of Triatominae belonging to the three genera of public health importance (Triatoma, Rhodnius and Panstrongylus) were captured. This trapping system provides an effective way to detect the presence of triatomines in terrestrial and arboreal silvatic habitats and represents a promising tool for ecological studies. Various lines of research are contemplated to improve the performance of this trapping system.
Asunto(s)
Ecosistema , Control de Insectos , Insectos Vectores , Árboles , Triatominae , Animales , Insectos Vectores/clasificación , Triatominae/clasificaciónRESUMEN
Os autores registram a ocorrencia de mais de um caso autoctone de doenca de Chagas no Estado do Para, desta feita na localidade de Sao Francisco do Para, distante 95 km da capital. Esse caso constitui o 11ä registrado no Estado e o 29ä da bacia amazonica. O paciente, um menino de 7 anos de idade, teve diagnostico sorologico e parasitologico positivos para T. cruzi. O perfilenzimatico da amostra isolada foi caracterizado por eletroforese de enzimas como zimodema
