IFN-γ responses also did not differ in culture-negative vs. –positive individuals at this time point [96 (IQR: 24-164) vs. 136 (77 vs. 210) SFC⋅10−6 PBMCs for TSPOT.TB (p = 0.21), 3.2 (0.0–8.9) vs. 1.3 (0.3–4.4) for QFT-GIT (p = 0.78), and 93 (50–125) vs. 96 (51–166) for PPD (p = 0.67)] nor were there any differences in baseline IFN-γ response between 2 month culture converters and non-converters [110 (34–207) vs. 76 (4 vs. 98) SFC⋅10−6 PBMCs for TSPOT.TB (p = 0.10), 2.2 (0.4–4.9) vs. 4.2 (0.5–5.3) for QFT-GIT (p = 0.63), and 122 (27–161) vs. 81 (27–157) for PPD (p = 0.57)]. This evidence concerns the gene IFNG and tuberculosis.