Fig. 4
Graphical representation of genetic distance against the geographical distance between different tuberculosis cases. The genetic differences were estimated using the genotypes and phylogenetic reconstruction and the geographical distance between different cases was calculated through the use of georeferencing coordinates. The 3486 datapoints were obtained comparing all possible combinations of case pairs. Data points are highlighted as: red in cases related genotypically but not displaying direct geographic connection; yellow for genotypically related cases in close proximity; in blue household cases with unrelated strains; and grey for cases not related either genotypically or geographically