Fig. 6: Transmission heatmaps and networks.

a,b, Heatmaps showing the number of transmission events between each pair of sources, as determined by SNP thresholds of 1 (a) and 10 (b). The shading is proportional to the number of events and does not account for the number of samples from each source. c,d, Transmission networks showing the number of transmission events between each pair of sources, using the same data as in the heatmaps in a (c) and b (d), except that within-source events are not shown. The nodes represent the sources and the area of the node is proportional to the number of samples from that source. The edges show the number of transmission events and the thickness of the edge is proportional to the number of events between the two sources.