Levels of IFN-γ were lower in TB and TB+T2DM compared with control group (2278.7±929.2 versus 4020.7±838.5 pg/ml, p<0.05; 3501.2±488.3 versus 4020.7±838.5 pg/ml, p>0.05). The gene discussed is IFNG; the disease is tuberculosis.