Test Directory

QuantiFERON-TB Gold Plus, Blood

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Updated Test Information:

Test Description
QuantiFERON-TB Gold Plus, Blood

Latent TB, Latent Tuberculosis, LTBI, M. tuberculosis, Mycobacteria, Mycobacterium tuberculosis, PPD, QuantiFERON, QFT, Tb, MTb, Interferon-gamma, IFN-gamma, IGRA, Interferon-gamma release assay

Test ID
General Information

Useful for:
Indirect test for Mycobacterium tuberculosis infection, to be used in conjunction with risk assessment, radiography, and other medical and diagnostic evaluations

Specimen Type

Whole Blood

Specimen Requirements

-Standard Altitude: QuantiFERON-TB Gold Plus Collection Kit (T794)
-High Altitude: QuantiFERON-TB Gold Plus High Altitude Collection Kit (T795)

Specimen Collection / Processing Instructions

Maintain tubes at room temperature (17°C 27°C) until incubation. Do not refrigerate or freeze. See special collections constructions on Mayo website: Collection & Processing Instructions

Additional Processing Details

4 mL: 1 mL per tube (4 tubes)


Refrigerated 28 days

Unacceptable Specimen Conditions

Other Specimen submitted not following kit guidelines


Enzyme-Linked Immunosorbent Assay (ELISA)

Estimated TAT

2-4 days

Testing Schedule


CPT Code(s)


Reference Range


Performing Lab


LOINC Code(s)

71773-6, 64084-7, 88517-8, 71774-4, 71776-9