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Remote sensing, geographical information system and spatial analysis for schistosomiasis epidemiology and ecology in Africa

  • C. Simoonga (a1) (a2), J. Utzinger (a3), S. Brooker (a4) (a5), P. Vounatsou (a3), C. C. Appleton (a6), A. S. Stensgaard (a7) (a8), A. Olsen (a7) and T. K. Kristensen (a7)...
Summary

Beginning in 1970, the potential of remote sensing (RS) techniques, coupled with geographical information systems (GIS), to improve our understanding of the epidemiology and control of schistosomiasis in Africa, has steadily grown. In our current review, working definitions of RS, GIS and spatial analysis are given, and applications made to date with RS and GIS for the epidemiology and ecology of schistosomiasis in Africa are summarised. Progress has been made in mapping the prevalence of infection in humans and the distribution of intermediate host snails. More recently, Bayesian geostatistical modelling approaches have been utilized for predicting the prevalence and intensity of infection at different scales. However, a number of challenges remain; hence new research is needed to overcome these limitations. First, greater spatial and temporal resolution seems important to improve risk mapping and understanding of transmission dynamics at the local scale. Second, more realistic risk profiling can be achieved by taking into account information on people's socio-economic status; furthermore, future efforts should incorporate data on domestic access to clean water and adequate sanitation, as well as behavioural and educational issues. Third, high-quality data on intermediate host snail distribution should facilitate validation of infection risk maps and modelling transmission dynamics. Finally, more emphasis should be placed on risk mapping and prediction of multiple species parasitic infections in an effort to integrate disease risk mapping and to enhance the cost-effectiveness of their control.

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Corresponding author
*Corresponding author. Christopher Simoonga, Ministry of Health, P.O. Box 30205, 10101 Lusaka, Zambia. Tel.: +260 211 253-053; Fax: +260 211 253-053; E-mail: csimoonga@moh.gov.zm
References
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Parasitology
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