Figure 2.

Effect of oxidative stress on the growth of MtbΔ2159. (A). CFU enumeration of M. tuberculosis strains treated with 2mM H₂O₂. The graphs representing log10 CFUs of wild type H37Rv, MtbΔ2159 and CΔ2159 strains treated with 2 mM H₂O₂ displaying sensitivity per/mL of total culture. (B). CFU of M. tuberculosis strains treated with 4 mM H₂O₂. The bar graphs represent the log10 CFUs of strains treated with 4 mM H₂O₂, the CFU data are presented per ml of total culture. Two-way ANOVA was using Bonferroni post-test was employed to identify the significance between the strains. Error bars indicate mean ± SD and significant at ** significant at p < 0.01 and * p < 0.1.