Colony forming units (CFU) of M. tuberculosis in the lung of infected mice. The BKO mice which received electroporated B cells and control wild-type mice, were inoculated with 1x105 M. tuberculosis. Thirty days post infection, the CFU in the lung homogenates were analyzed. Assays were performed in triplicate and the results represent the mean ± SD of at least two independent experiments. *P < 0,05 versus wild-type mice (One-way ANOVA with Tukey's post-test).