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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 99, No. s1, 2004, pp. 73-78
Bioline Code: oc04090
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 99, No. s1, 2004, pp. 73-78

 en The Initial Epidemiological Studies in the Low Endemicity Schistosomiasis Area in Esteio, Rio Grande do Sul, the Southernmost Brazilian State, 1997 to 2000
Carlos Graeff-Teixeira; Cristiana Valar; Caroline K de Moraes; Adriana Mostardeiro Salvany; Charles de Ornellas Brum; Rafael Lucyk Maurer; Renata Ben; Lúcia BLF Mardini; Marta Bañolas Jobim & Ronaldo Santos do Amaral

Abstract

Nor Biomphalaria glabrata check for this species in other resources neither Schistosoma mansoni check for this species in other resources were reported from Rio Grande do Sul, the southernmost Brazilian state before 1997. Their detection next to the Sinos River, Esteio, confirmed predictions of schistosomiasis expansion to the south. Parasitological examinations both in snails and fecal samples from the human population were performed from 1997 to 2000. The last 3 out of 5 surveys were performed after a preliminar serological screening procedure in a risk group identified at a population census. A total of 11 infected individuals were found infected and snails from 2 different sites were positive for S. mansoni. Samples from these 2 and other sites were identified as B. glabrata. Egg counts in feces were below 1 per gram in 6 out of 11 patients. Some socio-cultural perceptions of water contact activities next to the Sinos River may cause difficulties to control efforts, but they also may be partially acting against a very rapid increase in transmission intensity. The southernmost schistomiasis mansoni foci in Americas rise the alert for its ongoing expansion.

Keywords
Schistosoma mansoni - Biomphalaria glabrata - low endemic area - Rio Grande do Sul - Brazil

 
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