Significant correlations were found only between (i) the levels of spontaneous IFN-γ production (NIL probes) and patient' age (r = 0.391, p = 0.001) and (ii) the levels of mitogen-induced IFN-γ production (MIT probes) and the form of pulmonary pathology (r = −0.352, p = 0.004) and TB extent (r = −0.395, p = 0.001). Here, IFNG is linked to tuberculosis.