In our study, concentrations of IL-6 and IFN-γ remained unchanged during the anti-TB treatment in disagreement with different investigations where IL-6 and IFN-γ tended to decrease during ATT [28, 30, 31, 33, 36–38] and with other reports which showed increases in IFN-γ levels [39, 41–43]. Here, IL6 is linked to tuberculosis.