¶ Interpretation indicating that infection is likely. Mycobacterium tuberculosis ** Interpretation indicating that infection is not likely. M. tuberculosis Interpretation indicating an uncertain likelihood of infection. †† M. tuberculosis TABLE 2. Interpretation criteria for the QuantiFERON-TB Gold In-Tube Test (QFT-GIT) Mitogen Interpretation Nil* TB Response† Response§ Positive¶ IU/mL and of Nil Any ≤8.0 ≥0.35 ≥25% Negative** <0.35 IU/mL or <25% of Nil ≤8.0 ≥0.5 Indeterminate†† <0.35 IU/mL or <25% of Nil <0.5 ≤8.0 >8.0 Any Any Source: Based on Cellestis Limited. QuantiFERON-TB Gold In-Tube [Package insert]. Available at . * The interferon gamma (IFN-γ) concentration in plasma from blood incubated without antigen. The IFN-γ concentration in plasma from blood stimulated with a single cocktail of peptides representing † early secretory antigenic target-6 (ESAT-6), culture filtrate protein-10 (CFP-10), and part of TB 7.7 minus Nil. § The IFN-γ concentration in plasma from blood stimulated with mitogen minus Nil. ¶ Interpretation indicating that infection is likely. Mycobacterium tuberculosis ** Interpretation indicating that infection is not likely. M. tuberculosis Interpretation indicating an uncertain likelihood of infection. †† M. tuberculosis TABLE 3. Interpretation criteria for the T-SPOT.TB Test
¶ Interpretation indicating that Mycobacterium tuberculosis infection is likely. ** Interpretation indicating that M. tuberculosis infection is not likely. †† Interpretation indicating an uncertain likelihood of M. tuberculosis infection. TABLE 2. Interpretation criteria for the QuantiFERON-TB Gold In-Tube Test (QFT-GIT) Interpretation Nil* TB Response† Mitogen Response§ Positive¶ ≤8.0 ≥0.35 IU/mL and ≥25% of Nil Any Negative** ≤8.0 <0.35 IU/mL or <25% of Nil ≥0.5 Indeterminate†† ≤8.0 <0.35 IU/mL or <25% of Nil <0.5 >8.0 Any Any Source: Based on Cellestis Limited. QuantiFERON-TB Gold In-Tube [Package insert]. Available at . * The interferon gamma (IFN-γ) concentration in plasma from blood incubated without antigen. † The IFN-γ concentration in plasma from blood stimulated with a single cocktail of peptides representing early secretory antigenic target-6 (ESAT-6), culture filtrate protein-10 (CFP-10), and part of TB 7.7 minus Nil. § The IFN-γ concentration in plasma from blood stimulated with mitogen minus Nil. ¶ Interpretation indicating that Mycobacterium tuberculosis infection is likely. ** Interpretation indicating that M. tuberculosis infection is not likely. †† Interpretation indicating an uncertain likelihood of M. tuberculosis infection. TABLE 3. Interpretation criteria for the T-SPOT.TB Test