Figure 7: Granuloma index of the G1, G2, G3, G4, and G5 (DNA/DNA/BCG) groups in the lungs 5 weeks and 10 weeks after M. tuberculosis challenge. Results are expressed as the mean ± S.D. of triplicates of 5 mice per group. The statistical significance of differences between the groups was determined by Dunnett test, as compared with the naive (N) group or the BCG alone (B) group. as compared with the BCG alone (B*) group. The statistical significance of differences () of granuloma index of 5 weeks G3 group compared to the G4 group.