The Distribution of Biomphalaria 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

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

A total of 256 sites in 11 habitats were surveyed for Biomphalaria 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 and 59 (3.3%) B. straminea. 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 of 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. 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 transmission and reinfection.

Original languageEnglish (US)
Pages (from-to)57-66
Number of pages10
JournalMemorias do Instituto Oswaldo Cruz
Volume96
Issue numberSUPPL.
StatePublished - Dec 1 2001

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Keywords

  • Biomphalaria glabrata
  • Biomphalaria straminea
  • Brazil
  • Environmental factors
  • Geographic distribution
  • Local knowledge
  • Minas Gerais

ASJC Scopus subject areas

  • Microbiology (medical)

Cite this

Kloos, H., De Souza, C., Gazzinelli, A., Soares Filho, B. S., Da Costa Temba, P., Bethony, J., Page, K., Grzywacz, C., Lewis, F., Minchella, D., LoVerde, P., & Corrêa Oliveira, R. (2001). The Distribution of Biomphalaria spp. in Different Habitats in Relation to Physical, Biological, Water Contact and Cognitive Factors in a Rural Area in Minas Gerais, Brazil. Memorias do Instituto Oswaldo Cruz, 96(SUPPL.), 57-66.