High spatial resolution mapping of malaria transmission risk in The Gambia, West Africa, using landsat TM satellite imagery

Claus Bogh, Steven W. Lindsay, Sian E. Clarke, Andy Dean, Musa Jawara, Margaret Pinder, Christopher J. Thomas

Research output: Contribution to journalArticlepeer-review

80 Citations (SciVal)

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-km2 study area.
Original languageEnglish
Pages (from-to)875-881
Number of pages7
JournalAmerican Journal of Tropical Medicine and Hygiene
Volume76
Issue number5
Publication statusPublished - May 2007

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