IFNG and tuberculosis: In the combined group of 19 MTB sensitized individuals (representing a subset of the previously studied n = 10 active TB patients, and n = 9 LTBI, selected based on availability of frozen PBMC remaining after the first set of experiments), the highest IFN-γ response was seen to p51-65, with a median of 27 spot forming cells/million PBMC (SFC/106, IQR 12–85), recognized by 67% of all PBMC samples (Fig. 2).