Sensoriamento remoto aplicado na espacialização de esquistossomose no sul-sudoeste do Estado de Minas Gerais

Abstract

The schistosomiasis is a serious disease that is considered endemic in fifty-four countries located in the American and African continents. It is estimated that in Brazil the number of people infected by S. mansoni vary among 2,5 to 6 million of peoples. In this context, this study shows the spatial distribution of schistosomiasis in two localities (Guaranésia and Arceburgo) placed in the south of State of Minas Gerais. The spatial analysis were performed based in remote sensing data, and involved: a) the land cover mapping based in Landsat-5/TM images; b) hypsometric mapping based in Digital Elevation Model from SRTM (Shuttle Radar Topography Mission); c) drainage network mapping obtained by topographic charts from IBGE and; d) density mapping of the snails found in the study area by Kernel Estimation. To identify the human cases of schistosomiasis the Kato-Katz and Lutz/HPJ methods for diagnosis was performed. The results show the presence of snails in the study area. Fieldwork realized in 2012 indicated six focus of B. tenagophila, totaling 681 snails that were no infected. The diagnosis in the human reveals the prevalence rate for Guaranésia and Arcerburgo of approximately 13,5% for a total of 480 tests. In 13,5%, 32% were infected with S. mansoni. The spatial analysis considering land cover, drainage network, hypsometric, density of snails and infected cases in humans indicated risk of transmission in Arceburgo, where the snails are concentrated. A case of infected person was noticed in rural zone.Pages: 8606-861

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