The initial epidemiological studies in the low endemicity schistosomiasis area in esteio, Rio Grande do Sul, the southernmost Brazilian State, 1997 to 2000

Memórias do Instituto Oswaldo Cruz

Carlos Graeff-teixeira²  Cristiana Valar²  Caroline K De Moraes²  Adriana Mostardeiro Salvany²  Charles De Ornellas Brum²  Rafael Lucyk Maurer²  Renata Ben²  Lúcia Blf Mardini²  Marta Bañolas Jobim¹  Ronaldo Santos Do Amaral¹ 

[1] ,PUCRS Faculdade de Biociências Instituto de Pesquisas BiomédicasPorto Alegre RS

关键词: Schistosoma mansoni;    Biomphalaria glabrata;    low endemic area;    Rio Grande do Sul;    Brazil;   

DOI  :  10.1590/S0074-02762004000900013

来源: SciELO

【 摘 要 】

Nor Biomphalaria glabrata neither Schistosoma mansoni 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.

【 授权许可】

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