IFNG and tuberculosis: (1) Higher IFN-γ levels TB vs. HC, had a high overall agreement (98.0%) with T-SPOT.TB, the combination of Rv2645 and CFP10-ESAT6 increased sensitivity and specificity of 96.0% and 98.2%, respectively. (2) Peptide Rv2654c51–65 boosted the quantitative performance of the QFT-GIT assay from 1.83 IU/ml to 2.83 IU/ml