Interpretation Criteria used for QuantiFERON-TB Gold and QuantiFERON-TB Gold In-Tubea Tests.

aInterpretation criteria used for QFT-GIT differed from that approved by the FDA in Nov, 2008.b“[Nil]” is the IFN-γ concentration in plasma from unstimulated blood.c“TB Response” for the QuantiFERON-TB Gold test is the higher IFN-γ concentration in plasma from blood stimulated by a cocktail of peptides representing ESAT-6 or CFP10, minus [Nil].d“TB Response” for the QuantiFERON-TB Gold In-Tube test is the IFN-γ concentration in plasma from blood stimulated by a single cocktail of peptides representing ESAT-6, CFP10, and part of TB7.7 minus [Nil].e“Mitogen Response” is the IFN-γ concentration in plasma from mitogen stimulated blood minus [Nil].