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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 96, No. s1, 2001, pp. 57-66
Bioline Code: oc01152
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 96, No. s1, 2001, pp. 57-66

 en The Distribution of Biomphalaria check for this species in other resources spp. in Different Habitats in Relation to Physical, Biological, Water Contact and Cognitive Factors in a Rural Area in Minas Gerais, Brazil
Helmut Kloos; Cecilia de Souza; Andrea Gazzinelli; Britaldo Silveira Soares Filho; Plinio da Costa Temba; Jeffrey Bethony; Kristen Page; Claudia Grzywacz; Fred Lewis; Dennis Minchella; Phillip LoVerde & Rodrigo Corrêa Oliveira

Abstract

A total of 256 sites in 11 habitats were surveyed for Biomphalaria check for this species in other resources in Melquiades rural area (State of Minas Gerais) in August and November 1999 and in March 2000. Of the 1,780 Biomphalaria collected, 1,721 (96.7%) were B. glabrata check for this species in other resources and 59 (3.3%) B. straminea check for this species in other resources . Snails were found in all habitats except in wells, with the largest mean numbers in tanks, seepage ponds and canals, and the smallest numbers in springs, rice fields and fishponds. People's knowledge of the occurrence of Biomphalaria at the collection sites and the presence of Biomphalaria ova were strongly correlated with the occurrence of snails, and distance between houses and collection sites, as well as water velocity were inversely correlated with Biomphalaria occurrence (p < 0.001). The strongest predictor o f Biomphalaria occurrence was the presence of tilapia fish in fishponds. Fourteen Biomphalaria (0.8% of all snails) found at 6 sites were infected with Schistosoma mansoni check for this species in other resources . Suggestions are made for the utilization of local people's knowledge in snail surveys and further studies are recommended on the possible use of tilapia for biological control of Biomphalaria in fishponds, as well as modeling of S. mansoni check for this species in other resources transmission and reinfection.

Keywords
Biomphalaria glabrata, Biomphalaria straminea, geographic distribution, environmental factors, local knowledge, Minas Gerais, Brazil

 
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