Mobile Site ›

Test Catalog

Test ID: QTBG    
Mycobacterium tuberculosis Infection Determination by QuantiFERON-TB Gold, Blood

Specimen Type Describes the specimen type needed for testing

Whole blood

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.


Standard Altitude: QuantiFERON-QTB Gold In-Tube Collection Kit (Supply T628)

High Altitude: QuantiFERON High Altitude Collection Kit (Supply T649)

Collection Instructions:

1. Special collection, incubation, and centrifugation procedures must be followed.

2. Prepare and transport specimen per instructions in Mycobacterium tuberculosis Infection Determination by QuantiFERON in Special Instructions.

Forms: If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

Microbiology Test Request Form (T244) (

Neurology Test Request Form (T732) (

General Test Request Form (T239) (

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

1 mL per tube (3 tubes)

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected


Mild OK; Gross OK


Mild OK; Gross OK




Specimen submitted not following kit guidelines

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
Whole bloodRefrigerated28 days