IFNG and tuberculosis: For example, Kartalija et al reported that IFN-γ production from PBMCs in response to MAC bacilli was weaker in patients with MAC-LD than in healthy controls13, which is consistent with the findings of the present study but in contrast to patients with TB who have been reported to have higher IFN-γ production than controls during stimulation with Mycobacterium tuberculosis antigens32.