Biomphalaria species distribution and its effect on human Schistosoma mansoni infection in an irrigated area used for rice cultivation in northeast Brazil

  • Delmany Moitinho Barboza Laboratório de Biologia Molecular, Departamento de Medicina, Hospital Universitário, Universidade Federal de Sergipe, Hospital Universitário, Aracaju, Sergipe, Brazil.
  • Cangjie Zhang Instituto de Tecnologia e Pesquisa, Universidade Tiradentes (UNIT), Aracaju, Sergipe, Brazil.
  • Nathaly Cardoso Santos Departamento de Geologia, Pós-Graduação em Geografia, Universidade Federal de Sergipe, Aracaju, Sergipe, Brazil.
  • Marília Matos Bezerra Lemos Silva Departamento de Geologia, Pós-Graduação em Geografia, Universidade Federal de Sergipe, Aracaju, Sergipe, Brazil.
  • Carla Virgínia Vieira Rollemberg Laboratório de Biologia Molecular, Departamento de Medicina, Hospital Universitário, Universidade Federal de Sergipe, Hospital Universitário, Aracaju, Sergipe, Brazil.
  • Fabio Jorge Ramalho de Amorim Laboratório de Biologia Molecular, Departamento de Medicina, Hospital Universitário, Universidade Federal de Sergipe, Hospital Universitário, Aracaju, Sergipe, Brazil.
  • Marlene Tiduko Ueta Departamento de Biologia Animal, Universidade Estadual de Campinas, São Paulo, Brazil.
  • Claudia Moura de Melo Instituto de Tecnologia e Pesquisa, Universidade Tiradentes (UNIT), Aracaju, Sergipe, Brazil.
  • José Antônio Pacheco de Almeida Departamento de Geologia, Pós-Graduação em Geografia, Universidade Federal de Sergipe, Aracaju, Sergipe, Brazil.
  • Verónica de Lourdes Sierpe Jeraldo Instituto de Tecnologia e Pesquisa, Universidade Tiradentes (UNIT), Aracaju, Sergipe, Brazil.
  • Amélia Ribeiro de Jesus | jesus-amelia@uol.com.br Laboratório de Biologia Molecular, Departamento de Medicina, Hospital Universitário, Universidade Federal de Sergipe, Hospital Universitário, Aracaju, Sergipe;, .

Abstract

The role of irrigated areas for the spread of schistosomiasis is of worldwide concern. The aim of the present study was to investigate the spatial distribution of the intermediate snail host Biomphalaria in an area highly endemic for schistosomiasis due to Schistosoma mansoni, evaluating the relationship between irrigation and types of natural water sources on one hand, and the influence of place and time of water exposure on the intensity of human infection on the other. A geographical information system (GIS) was used to map the distribution of the intermediate snail hosts in Ilha das Flores, Sergipe, Brazil, combined with a clinical/epidemiological survey. We observed a direct correlation between the intensity of human infection with S. mansoni and irrigation projects. Malacological studies to identify snail species and infection rates showed that B. glabrata is the main species responsible for human schistosomiasis in the municipality, but that B. straminea also plays a role. Our results provide evidence for a competitive selection between the two snail species in rice fields with a predominance of B. glabrata in irrigation systems and B. straminea in natural water sources.

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Published
2012-09-01
Section
Original Articles
Keywords:
Biomphalaria glabrata, Biomphalaria straminea, Schistosoma mansoni, geographical information system, irrigation, system, natural water sources, Brazil.
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How to Cite
Barboza, D. M., Zhang, C., Cardoso Santos, N., Matos Bezerra Lemos Silva, M., Vieira Rollemberg, C. V., de Amorim, F. J. R., Tiduko Ueta, M., Moura de Melo, C., Pacheco de Almeida, J. A., de Lourdes Sierpe Jeraldo, V., & Ribeiro de Jesus, A. (2012). Biomphalaria species distribution and its effect on human Schistosoma mansoni infection in an irrigated area used for rice cultivation in northeast Brazil. Geospatial Health, 6(3), S103-S109. https://doi.org/10.4081/gh.2012.128