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Distribution of the various M. tuberculosis complex strains among eight different groups. The MIRU copy numbers of a total of 148 strains of the M. tuberculosis complex were determined in this study and in a previous study (19). The distributions of the strains are indicated as percentages for each group. Groups IV, VI, and VIII (black bars) contain only BCG strains. Groups I, II, III, V, and VII (white bars) contain only non-BCG strains.
