Predicting frequency distribution and influence of sociodemographic and behavioral risk factors of Schistosoma mansoni infection and analysis of co-infection with intestinal parasites

  • Carla V.V. Rollemberg Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • Marília M.B.L. Silva Post-doc Geography Unit, Department of Geography, Federal University of Sergipe, Brazil.
  • Karla C. Rollemberg Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • Fábio R. Amorim Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • Nayanna M.N. Lessa Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • Marcos D.S. Santos Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • Acácia M.B. Souza Post-doc Geography Unit, Department of Geography, Federal University of Sergipe, Brazil.
  • Enaldo V. Melo Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • Roque P. Almeida Department of Geology, Federal University of Sergipe, Brazil.
  • Ângela M. Silva Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • Guilherme L. Werneck Research Institute in Immunology, National Institute of Science and Technology, Brazilian Research and Technology Council, São Paulo; Department of Social Medicine, Institute of Medicine and Health, Public University of Rio de Janeiro-Fundação Oswaldo Cruz, Rio de Janeiro, Brazil.
  • Mario A. Santos Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe, Brazil.
  • José A.P. Almeida Department of Geology, Federal University of Sergipe, Brazil.
  • Amélia R. Jesus | jesus-amelia@uol.com.br Laboratory of Molecular Biology, University Hospital, Federal University of Sergipe; Research Institute in Immunology, National Institute of Science and Technology, Brazilian Research and Technology Council, São Paulo, Brazil.

Abstract

Geospatial analysis was used to study the epidemiology of Schistosoma mansoni, intestinal parasites and co-infections in an area (Ilha das Flores) in Sergipe, Brazil. We collected individually georeferenced sociodemographic, behavioral and parasitological data from 500 subjects, analyzed them by conventional statistics, and produced risk maps by Kernel estimation. The prevalence rates found were: S. mansoni (24.0%), Trichuris trichiura (54.8%), Ascaris lumbricoides (49.2%), Hookworm (17.6%) and Entamoeba histolytica (7.0%). Only 59/500 (11.8%) individuals did not present any of these infections, whereas 279/500 (55.8%) were simultaneously infected by three or more parasites. We observed associations between S. mansoni infection and various variables such as male gender, being rice farmer or fisherman, low educational level, low income, water contact and drinking untreated water. The Kernel estimator indicated that high-risk areas coincide with the poorest regions of the villages as well as with the part of the villages without an adequate sewage system. We also noted associations between both A. lumbricoides and hookworm infections with low education and low income. A. lumbricoides infection and T. trichiura infection were both associated with drinking untreated water and residential open-air sewage. These findings call for an integrated approach to effectively control multiple parasitic infections.

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Published
2015-05-18
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Original Articles
Keywords:
Schistosomiasis, Schistosoma mansoni, Soil-transmitted helminths, Intestinal parasites, Risk factors
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How to Cite
Rollemberg, C. V., Silva, M. M., Rollemberg, K. C., Amorim, F. R., Lessa, N. M., Santos, M. D., Souza, A. M., Melo, E. V., Almeida, R. P., Silva, Ângela M., Werneck, G. L., Santos, M. A., Almeida, J. A., & Jesus, A. R. (2015). Predicting frequency distribution and influence of sociodemographic and behavioral risk factors of Schistosoma mansoni infection and analysis of co-infection with intestinal parasites. Geospatial Health, 10(1). https://doi.org/10.4081/gh.2015.303