Malacologia dos gêneros Lymnaea e Biomphalaria na mesoregião sul espírito-santense, e avaliação de extratos de Melia Azadirachta indica e Cymbopogon winterianus como agentes moluscicidas
Nenhuma Miniatura disponível
Data
2010-08-27
Autores
Almeida, Bethânia Ribeiro de
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal do Espírito Santo
Resumo
Mollusks of the genders Biomphalaria and Lymnaea have great medical importance as intermediate hosts of the parasites Schistosoma mansoni and Fasciola hepatic. In this study, the occurrence of these mollusks was evaluated in 14 counties located in the catchments of the following rivers: Itapemirim, Itabapoana and Benevente in Southern Espírito Santo State, Brazil. The species B. tenagophila e L. columella were found in all counties assessed. Furthermore, the tolerance of these mollusks to molluscicides and their low selectivity raises concerns and show the importance of finding new vegetable biodegradable substances to control these mollusks. This study assessed the use of vegetable extracts originated from Melia azedarach var azedarach, Azadirachta indica A. Juss, and Cymbopogon winterianus as natural molluscicides. Hidroalcoholic, ethyl acetate and hexane crude extracts, obtained from leaves of plants, such as chinaberry, neem and citronella, were tested as molluscicides against Lymnaea columella, which is the intermediate host of Fasciola hepatica. The low concentration extracts of neem, citronella and chinaberry diluted in ethanol, ethyl acetate and hexane shown to be effective in controlling snails and inhibiting the oviposition of shellfish, preventing its reproduction, and, therefore, the spread of these parasitic diseases.
Descrição
Palavras-chave
Schistosomiasis , Fascioliasis , Molluscicide , Esquistossomose , Fasciolose , Drogas moluscicidas