QFT-Plus is an improved version of the current QuantiFERON-TB Gold test, using the same test principle, procedure and reliable technology. This TB blood test is highly accurate, with sensitivity of 95.3% and specificity of 97.6%.
QFT-Plus is an IFNγ release assay, commonly known as an IGRA, and measures the cell-mediated immune response to specific TB antigens in whole blood. Patients may be tested in a single patient visit, with objective results.
Additional clinical value comes from the exclusive TB-specific antigens that elicit CD4+ and CD8+ T-cell responses. This new test format, combined with improvements in tuberculosis test formulation and manufacturing, means more robust and reliable assay performance.