Geographical distribution of Plasmodium spp. surveys locations based on compiled data on children aged <16 years between 1988 and 2007 in Côte d’Ivoire. The data were stratified in two categories: survey carried out before and since the year 2000. The extent of three major ecozones in the country, which was derived from various satellite data, is displayed in the background. Centroids of the ecozones are given as black symbols.