HIGH SPATIAL RESOLUTION MAPPING OF MALARIA TRANSMISSION RISK IN THE GAMBIA, WEST AFRICA, USING LANDSAT TM SATELLITE IMAGERY.


Bøgh, C; Lindsay, SW; Clarke, SE; Dean, A; Jawara, M; Pinder, M; Thomas, CJ; (2007) HIGH SPATIAL RESOLUTION MAPPING OF MALARIA TRANSMISSION RISK IN THE GAMBIA, WEST AFRICA, USING LANDSAT TM SATELLITE IMAGERY. The American journal of tropical medicine and hygiene, 76 (5). pp. 875-881. ISSN 0002-9637

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Abstract

Understanding local variability in malaria transmission risk is critically important when designing intervention or vaccine trials. Using a combination of field data, satellite image analysis, and GIS modeling, we developed a high-resolution map of malaria entomological inoculation rates (EIR) in The Gambia, West Africa. The analyses are based on the variation in exposure to malaria parasites experienced in 48 villages in 1996 and 21 villages in 1997. The entomological inoculation rate (EIR) varied from 0 to 166 infective bites per person per rainy season. Detailed field surveys identified the major Anopheles gambiae s.l. breeding habitats. These habitats were mapped by classification of a LANDSAT TM satellite image with an overall accuracy of 85%. Village EIRs decreased as a power function based on the breeding areas size and proximity. We use this relationship and the breeding habitats to map the variation in EIR over the entire 2500-km(2) study area.

Item Type: Article
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Disease Control
Research Centre: Malaria Centre
PubMed ID: 17488908
Web of Science ID: 246326300018
URI: http://researchonline.lshtm.ac.uk/id/eprint/10005

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