Comparing the concentrations of the cytokines in both TB groups, the patients with advanced forms of TB were characterised by a lower IFN-γ level (culture-positive: 1.00±1.06 IU/ml, culture-negative: 1.38±1.44 IU/ml) than those with mild (culture-positive: 4.59±4.77 IU/ml, culture-negative: 5.92±4.19 IU/ml) or moderate (culture-positive: 3.45±3.49 IU/ml, culture-negative: 5.06±3.86 IU/ml) TB forms (Table 5). The gene discussed is IFNG; the disease is tuberculosis.