Figure 2. An example of the two buffer types used in this examination, sites A4 and A5 in Akonolinga.

This is in the north of Akonolinga, near the village of Emvong. The upper panel is a 5 km buffer around the sites, within this region we describe the topography and land cover, and its association with M. ulcerans abundance. We compare this to the watershed buffer (lower panel). The watershed is the drainage area for each site, in principle all water that falls within this region will eventually pass through the sample site.