Abstract
Schistosomiasis mansoni is an endemic disease in underdeveloped or developing countries. The study aimed to define schistosomiasis prevalence in Bom Gosto village, Tutóia, Maranhão, in 2008 and detect intermediate host occurrence. A survey of data from stool samples examined by the Municipal Department of Health and National Health Foundation was conducted. Next, 60 snails were collected and analyzed. Mollusk analysis was achieved by the crushing process. The Kato-Katz method was used to evaluate fecal sediment. According to data from the Municipal Department of Health and FUNASA, schistosomiasis prevalence in the village was 3.2%. The 60 snails were identified as Biomphalaria glabrata and five (8.3%) were parasitized by Schistosoma mansoni. The Bom Gosto village is a low prevalence region of schistosomiasis mansoni. The study area has all the components of the epidemiological chain of S. mansoni, which explains the occurrence of disease in the region.
Highlights
Schistosomiasis mansoni is an endemic disease in underdeveloped or developing countries
The 60 snails were identified as Biomphalaria glabrata and five (8.3%) were parasitized by Schistosoma mansoni
The effect of the number of stool samples on the observed prevalence and the infection intensity with Schistosoma mansoni among a population in an area of low transmission
Summary
Atendendo à resolução no 196/96 do Conselho Nacional de Saúde, que trata das normas para pesquisa envolvendo seres humanos, este projeto teve seu protocolo aprovado pelo Comitê de Ética em Pesquisa da Universidade Federal do Piauí. Em 2008, foram realizados exames parasitológicos em aproximadamente 78% da população (1.421 habitantes). Apenas 45 amostras foram positivas, tendo-se o percentual de 3,2% de prevalência de esquistossomose na população estudada. Os dados epidemiológicos individuais não foram disponibilizados pela FUNASA. Todos os caramujos foram identificados como sendo da espécie Biomphalaria glabrata. 8,3% encontravam-se infectados por S. mansoni, em julho, agosto e outubro (Tabela 1). TABELA 1 - Valores absolutos de caramujos da espécie Biomphalaria glabrata infectados com Schistosoma mansoni coletados do Rio Bom Gosto de maio a outubro de 2008
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