Physico-chemical and biological aspects related to the occurrence of Biomphalaria glabrata in foci of schistosomiasis in coastal areas of the State of Pernambuco, Brazil

Química Nova

Pieri, Otávio¹  Barbosa, Constança Simões¹  Universidade Federal Rural de Pernambuco, Recife, Brasil¹  Silva, Petronildo Bezerra da¹  Universidade Federal de Pernambuco, Recife, Brasil¹  Travassos, Antônio¹  Departamento de Biologia Animal, Rio de Janeiro, Brasil¹  UFPE, Recife, Brasil¹  Florencio, Lourdinha¹ 

关键词: Biomphalaria glabrata;    salinity;    aquatic environments.;   

DOI  :  10.1590/S0100-40422006000500003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

Unknown