Minimum spanning tree based on the diversity of MIRU-VNTR 24-loci data. The different complexes identified are coloured (maximum neighbour distance: four changes; minimum size: two MIRU-VNTR types) by the set of 24-loci among the 244 M. tuberculosis strains analyzed. The size of each circle is proportional to the number of MIRU-VNTR types belonging to a particular complex. LAM=M. tuberculosis Latin American Mediterranean.