Quantiferon Gold - Exposure to M. tuberculosis Test

Alternate Names	Quantiferon Gold TB, Quantiferon Gold IT, IGRA, Interferon Gamma
Ordering Information	PLEASE NOTE: New order of draw: 1 grey top tube (Nil) 1 green top tube (TB Antigen 1) 1 yellow top tube (TB Antigen 2) 1 purple top tube (Mitogen) Please ensure tubes are filled to a level within the line marker; under-filled and over-filled tubes are unsuitable for testing. Samples for Quantiferon Gold should NOT be collected on Saturdays.
Laboratory	Biochemistry
Specimen	Blood
Container	See collection instructions
Additional Collection Instructions	Four special blood collection tubes packaged together with instructions and available from the Specimen Collection Centre or Microbiology: must be collected in the following order 1 grey top tube (Nil) 1 green top tube (TB Antigen 1) 1 yellow top tube (TB Antigen 2) 1 purple top tube (Mitogen) All 4 tubes MUST be collected and tied together with an elastic band after collection. Collect 1 mL blood into each tube and mix by inversion 10 times. Thorough mixing is required to dissolve the antigen coated onto the inside of the tubes.
Minimum Adult Volume	None
Minimum Paediatric Volume	None
Frequency	Once a week

These PDF documents can be downloaded for your reference

Test Code	QTB
Laboratory Notes	Quantiferon Gold samples must be incubated at 37 degrees for 16-24 hours. Note: Samples collected on Saturdays can still be accepted, but staff must ensure the samples are spun the following day.

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