The Quantiferon-TB Gold (QFTB-G) is a test recommended for detection of the cellular immune response to infection with Mycobacterium tuberculosis, the agent that causes tuberculosis (TB).
Synonyms: Interferon-gamma Release Assay (IGRA) for Mycobacterium tuberculosis
Collection: 6 mL whole blood collected in a no gel lithium heparin (green-top) tube
Collect 6 mL of blood by venipuncture into a lithium heparin (green-top) tube. Hold tube at room temperature (17-25ºC) for between 15 minutes and 3 hours after blood collection. Refrigerate at 2-8ºC sodium heparin (green top) tubes.