Figure 6

Geographic distribution of genogroups. Map created based on the geographic distribution of the genogroups of the 37 field isolates included in the study. Each field isolate was mapped according to genogroup and to the production zone from which it was collected. High- and low-virulent isolates were found in all regions, with a tendency for the high-virulent isolates to be more prevalent in the mid- and northern regions of Norway. Grey dashed lines indicate production zones.