QuantiFERON‑TB Gold Plus, 1‑Tube (Change effective as of 05/20/24: Refer to 3017554)

Casandra

Casandra Test Code AR30498Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 3000400CPT Code 86480

QuantiFERON‑TB Gold Plus, 1‑Tube (Change effective as of 05/20/24: Refer to 3017554)

Also known as: QFT-PLUS

Clinical Use

Order Test

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

Not provided.

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.

Test Details

New York Approved

Methodology

Immunoassay (Multiplex Protein Panel)

Biomarkers

5 targets

QuantiFERON Mitogen minus NILQuantiFERON NILQuantiferon Plus TB1 minus NILQuantiferon Plus TB2 minus NILQuantiferon TB Gold Plus (qualitative interpretation)

LOINC Codes

Result Codes

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

Result Turnaround Time

1-4 days

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.