Figure 2From: Using sero-positivity to assess geospatial burden of contagious bovine pleuropneumonia on pastoral cattle herds of north-central NigeriaCBPP sero-positive nomadic cattle and herd proportional circle map in Niger State, north-central Nigeria (January to August, 2013). The area of each circle is the number of tested cattle that were sero-positive, overlaying risk herds in the agro-geographical zonesBack to article page