The blood test QuantiFERON-TB-Gold® we currently conduct will be replaced by the newer QuantiFERON-TB-Gold-Plus® test by March 2016. This test will require four test tubes (grey, green, yellow and purple) instead of the three test tubes (grey, red and purple) required today. Sample taking or pre-analytics will not be affected by this change.
Sample taking and pre-analytics
All four test tubes must be filled up to the black marking (1ml each) and then shaken gently 10 times. The tubes should be incubated at 37° C as soon as possible, but at least within 16 hours. The test tubes should be stored at room temperature before incubation and MUST NOT be cooled or refrigerated. For further information on sample taking, pre-analytics and interpretation go to: www.quantiferon.com/irm/content/PI/QFT/PLUS/2PK-Elisa/UK.pdf