Figure 2. Minimum spanning tree representation of the Horn of Africa isolates with respect to 700 isolates of various origins.

The 435 isolates from the Horn of Africa are displayed in white, whereas the isolates of worldwide origins are colored according to lineage using the same color code as in Figure 1. Red arrows: isolates selected for sequencing. The minimum spanning tree analysis is based upon the 19 VNTR loci shared by the 24 loci MLVA assays used by [13] and [22].