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ASPECTOS FÍSICO-QUÍMICOS E BIOLÓGICOS RELACIONADOS À OCORRÊNCIA DE BIOMPHALARIA GLABRATA EM FOCOS LITORÂNEOS DA ESQUISTOSSOMOSE EM PERNAMBUCO
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Fundação Oswaldo Cruz. Centro de Pesquisas Aggeu Magalhães. Departamento de Parasitologia. Recife, PE, Brasil.
Fundação Oswaldo Cruz. Centro de Pesquisas Aggeu Magalhães. Departamento de Parasitologia. Recife, PE, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Biologia Animal. Rio de Janeiro, RJ, Brasil.
Universidade Federal Rural de Pernambuco. Departamento de Botânica. Recife, PE, Brasil.
Universidade Federal de Pernambuco. Departamento de Engenharia Civil. Recife, PE, Brasil.
Fundação Oswaldo Cruz. Centro de Pesquisas Aggeu Magalhães. Departamento de Parasitologia. Recife, PE, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Biologia Animal. Rio de Janeiro, RJ, Brasil.
Universidade Federal Rural de Pernambuco. Departamento de Botânica. Recife, PE, Brasil.
Universidade Federal de Pernambuco. Departamento de Engenharia Civil. Recife, PE, Brasil.
Abstract
This study analyzes the physico-chemical and biological parameters of freshwater aquatic environments in coastal areas of the State of Pernambuco, Brazil, where snail vector foci and cases of schistosomiasis have been recorded. The tests were carried out using standard methods and sediments were analyzed using the X-ray fluorescence technique. The micro-algae were analyzed using conventional microscopy. The most abundant chemical elements in the sediments were Fe, Ca, Si and Al and there were high concentrations of electrolytes in comparison with data published in the literature. The mean values for salinity (7.7 g/L) and sulfate (489 mg/L) were much higher than normal for freshwater environments. The micro-algae identified are those that inhabit environments with higher levels of salinity. The snail Biomphalaria glabrata seems, therefore, to be more tolerant to salty environments and this constitutes a risk of spread of schistosomiasis.
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