Vaccination with any of the BCG strains tested here promoted no change in pulmonary levels of IL-2, IL-17, and IL-4, while both BCG strains reduced IFN-γ production in lungs of infected mice after 6 months of infection (Figure 4), whereas only vaccination with BCGΔBCG1419c significantly reduced TNF-α (p = 0.025) and IL-10 production (p = 0.026) (Figure 4). This evidence concerns the gene IL4 and infection.