Fig. 1

Prevalence of PCV3 and distribution of different genetic clusters of wild boars in and near Berlin. The size of the circles indicates the total number of investigated pigs, the percentage of PCV3-positive animals is shown in white inside the circle, the percentage of PCV3-negative animals in black. Two genetic clusters were identified, the Grunewald cluster (blue) and the Brandenburg cluster (brown). The border of Berlin (black line) is shown as well as the Berlin wall (red line) around the Western part of Berlin, which existed between 1961 and 1989. Around Berlin is the state Brandenburg. Background map: Habitat map of Berlin (modified after Stillfried et al. [43])