FIG 3.

Minimum spanning tree of 40 M. tuberculosis isolates from asylum seekers in the Netherlands (orange) and Denmark (blue), belonging to the same VNTR cluster. No unknown epidemiological links were allowed. The numbers on the branches indicate the genetic distance (in SNPs) to the nearest isolate. SNP differences between distant strains cannot be reconstituted by summing the number of SNPs on the branches. Red dotted lines represent cases of Somalian origin, and red solid lines represent cases of Eritrean origin; the first two digits in the case numbers indicate the year of TB diagnosis. Subclustering on the basis of WGS (≤12-SNP distance between isolates) is shown in gray.