TNF and tuberculosis: All groups were characterized by the presence of IFN-γ+ IL-2+ TNF-α+ CD4+ T cells, IFN-γ- IL-2+ TNF-α+ CD4+ T cells, IFN-γ+ IL-2- TNF-α+ CD4+ T cells, IFN-γ- IL-2- TNF-α+ CD4+ T cells; whereas the IFN-γ+ IL-2- TNF-α- CD4+ T cells were represented in all groups except for the TB.