Avaliação de vetores da doença de Chagas na área de influência direta da usina hidrelétrica de Corumbá IV, Goiás

Abstract

The objective of this study was to evaluate the diversity of found vectors as well as their habitat preference and apatial distribution in a region around Brasília within the area of direct influence of the reservoir of the Corumbá IV hydroelectric power plant (UEH Corumbá IV) comparing the data with the history of occurrence and prevalence of the Chagas disease in the region and the environmental impact of the power plant. In canopies of guariroba palm trees (Syagrus oleraceae) and graveteiro nests (Phacellodomus rufifrons) 1981 triatomines (barbeiros) were collected belonging to the species Rhodnius neglectus, Panstrongylus neglectus, Panstrongylus diasi and Psammolestes tertius within February 19th 2005 and January 21st 2006. The triatomines were also searched for in armadillo holes, hen houses, and rural houses but no specimens were found. A parasitological examination was performed and none of the triatomines analyzed were contaminated by Trypanosoma cruzi despite the notification of Chagas disease cases in the surrounding cities of the study area. In conclusion, despite the presence of R. neglectus, pontecial vector, it was not possible to detect T. cruzi in the analyzed insects. However, the risk of human and triatomines infection should be carefully evaluated.