QuantiFERON‑TB Gold Plus, 1‑Tube (Change effective as of 05/20/24: Refer to 3017554)
Also known as: QFT-PLUS
Use
Aids in the detection of latent disease among persons at increased risk for tuberculosis (TB). Positive predictive value is decreased in low-risk populations. May be used in persons who have received the bacille Calmette‑Guérin (BCG) vaccine.
Special Instructions
This test has been replaced effective May 20, 2024; clients should refer to test 3017554. A single lithium‑heparin collection tube must be used (ARUP supply #54015). Do not collect or ship on holidays or the day before holidays.
Limitations
A qualitative result (Negative, Positive, or Indeterminate) is based on interpretation of NIL, MITOGEN minus NIL, TB1 minus NIL, and TB2 minus NIL values. A negative result does not completely rule out TB infection. False‑positive results in the absence of other clinical evidence are not uncommon. Positive predictive value decreased in low‑risk populations.
New York Approved
Methodology
Immunoassay (Multiplex Protein Panel)
Biomarkers
LOINC Codes
- 71774-4
- 71776-9
- 64084-7
- 88517-8
- 71773-6
Result Turnaround Time
1-4 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
6 mL (minimum 5 mL)
Minimum Volume
5 mL
Container
ARUP‑provided lithium‑heparin tube (supply #54015)
Collection Instructions
Collect whole blood directly into the ARUP‑provided single lithium‑heparin tube. Must use ARUP tube; do not collect or ship on holidays or day before. Mix by inverting 10 times, allow to remain at room temperature ≥15 minutes, refrigerate within 3 hours, ship same day.
Storage Instructions
Refrigerated transport; must be shipped the same calendar day.
Causes for Rejection
Clotted specimens; volume <5 mL; collection in non‑ARUP tube; shipped after holiday or collected day prior.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 3 hours |
| Refrigerated | 48 hours |
| Frozen | Unacceptable |