Figure 3.

Proximity of Plasmodium-infected wild-living apes to human habitation. The location of chimpanzee fecal samples collected near a village (black triangle) in southeastern Cameroon (inset) is shown. Plasmodium-positive and -negative samples are depicted by red and yellow triangles, respectively. Samples are numbered with capital letters indicating the field site, with their location determined using global positioning system (GPS) coordinates. Plasmodium-positive samples were found within 315 m of human habitation and in close proximity to a nearby road (brown line). The map was generated using Google Maps Pro (the scale bar represents 1 km); white areas indicate cloud cover.