Laboratory Services
QuantiFERON-TB Gold Plus
Print this pageUpdated Test Information:
| Test Description |
QuantiFERON-TB Gold Plus
|
|
|---|---|---|
| Synonym(s) |
IGRA-TB, interferon gamma release assay to tuberculosis antigens, QFT, Quantafluor TB, Quantiferon TB-gold, Quantiferon TB-gold Plus, UOW3622 |
|
| Test ID |
QFTB4
|
|
| Performing Lab |
Labcorp |
|
| General Information |
This test is for the diagnosis of latent TB (tuberculosis) infection. |
|
| Container Type |
The QuantiFERON(R)-TB Gold Plus collection kit contains the instructions for the collection and handling of (one each): (1) gray-top (with white ring), uncoated (nil); (2) green cap with white ring, TB1 tube; (3) yellow cap with white ring, TB2 tube; (4) purple top with white ring, mitogen-coated. A high altitude kit is also available for locations between 3350 and 6150 feet; a cap with a yellow ring differentiates the tubes. |
|
| Specimen Type |
Whole Blood |
|
| Specimen Requirements |
Preferred: 5 mL Lithium-Heparin whole blood ALTERNATE: 1 mL whole blood in each of the QuantiFERON TB Gold PLUS (4 tube set) tubes |
|
| Alternate Specimen Type |
QuantiFERON TB Gold PLUS (4 tube set) THE ALTERNATE SPECIMEN TYPE IS ONLY AVAILABLE TO LOCATIONS THAT CAN PROCESS AS LISTED IN THE "Specimen Collection/Processing Instructions" BELOW |
|
| Specimen Collection / Processing Instructions |
Preferred: Collect 5 mL Lithium-Heparin in a 7 mL non-gel tube (if using 4 mL Lithium-Heparin non-gel tubes collect 2 full tubes), Transport tube(s) refrigerated within 40 hours of collection. Friday collections should be received the same day of collection due to weekend operating hours. Alternate: This method is only available to locations that can process as follows: 1. Collect 1 mL minimum in each of the QuantiFERON TB Gold PLUS (4 tube set) tubes. 2. Incubate the QuantiFERON TB Gold PLUS (4 tube set) within 16 hours of collection for 16-24 hours. 3. Centrifuge the incubated QuantiFERON TB Gold PLUS (4 tube set) tubes for 15 minutes at 2,000-3,000 RCF (g). 4. Transport incubated/centrifuged QuantiFERON TB Gold PLUS tubes refrigerated. |
|
| Minimum Sample Volume |
Preferred: 5 mL Lithium-Heparin whole blood non-gel tube Alternate: 1 mL whole blood in each QuantiFERON TB Gold PLUS (4 tube set) |
|
| Stability |
Maintain specimen at room temperature for four tube collection kit. Stability: Kit MUST be incubated within 16 hours of collection. |
|
| Unacceptable Specimen Conditions |
Lithium-Heparin Gel separator tubes, Gross Hemolysis, Gross Lipemia, Gross Icterus, Alternate method submitted not following processing instructions |
|
| Department (code) |
Virology |
|
| CPT Code(s) |
86480 |
|
| Reflex Conditions |
No |
|
| STAT Orderable (Y/N) |
No |
|
| LOINC Code(s) |
