IFNG and tuberculosis: A positive TB diagnosis using the routine TB test is by the measurement of TB immunoreactivity determined by either a tuberculin skin test (TST) (89%- 95% sensitivity)7, the QuantiFERON-TB Gold In-Tube test (QFT-GIT) (Cellestis Limited, Carnegie, Victoria, Australia) QFT-GIT (83% sensitivity) or by the interferon-gamma release assay (IGRA)6-7.