Levantamento da malacofauna limnica e aspectos ecológicos de focos de esquistossomose em Ana Dias, Vale do Ribeira - SP / Malacofauna survey and ecological aspects of schistosomiasis focus in Ana Dias, Vale do Ribeira - SP

AUTOR(ES)

Cynthia Muniz

DATA DE PUBLICAÇÃO

2007

RESUMO

Schistosomiasis is one of the oldest parasitic diseases that exist. It is believed that the disease arrived in Brazil with the slave trade, and found favorable conditions to its spreading out. The Vale do Ribeira region is among the main transmission areas in the State of Sao Paulo. The valley is characterized by a hydrographic layout rich in small water veins such as irrigation ditches. Its disease transmission history dates back to 1953 when the Ana Dias focus, in the Itariri district, was described. There the intermediate host mollusc is the Biomphalaria tenagophila specie. This area is historically endemic remaining as an important schistosomiasis focus in the State of Sao Paulo, which justifies the necessity of new studies on its environment. The objective of this study was to carry out a malacofauna survey in irrigation ditches considered focus and breeding habitats in the region of Ana Dias, verifying which snail species occur associated to Biomphalaria tenagophila, as well as climatic, physical-chemical and environmental aspects and their correlations. The field study was carried through monthly water and snail sample collections during one year. The collected material was identified and analyzed in laboratory together with the site’s environmental and climatic variables. The results received statistical treatment and compared among themselves. Through this study was possible to conclude that the ditches are excellent breeding habitats for snails. The local Malacofauna is composed by the B. tenagophila, M. tuberculatus, P. sordida, P. marmorata, L. columella, D. depressissimum, D. anatinun, D. lucidum, G. ticaga and Pisidum sp species. The B. tenagophila specie was the dominant one competing with the M. tuberculatus one. The abiotic variables have influence on the malacofauna wealth and abundance, specially on those related to rainfall level.

ASSUNTO(S)

malacofauna vale do ribeira esquistossomose biomphalaria tenagophila malacofauna limnologia vale do ribeira limnology schistossomiasis vala de irrigação biomphalaria tenagophila irrigation ditch

Documentos Relacionados

• Caracterização da piscicultura na região do Vale do Ribeira - SP
• Levantamento da entomofauna associada às inflorescências de pupunheira (Arecaceae: Bactris gasipaes kunth) no Vale do Ribeira, SP
• Historical and member environmental aspects related to the occurrence of schistosomiasis in the municipality of Pindamonhangaba, SP.
• Regional Television in Vale do Paraíba SP: expansion, audience aspects and local insertion modes
• JÓIA CONTEMPORÂNEA: ASPECTOS ECOLÓGICOS E A PERCEPÇÃO DO CONSUMIDOR