Table 4

IFN-γ levels in 8 laboratory health care workers whose positive QuantiFERON-TB Gold In-Tube test results were confirmed upon additional testinga

SubjectDate (mo/day/yr)No. of IU/mlSerial no. of QFT GITNo. of previous TST-positive results (mo/day/yr of test) or mm of induration
605/31/20100.35QFT 10 (05/10/2004)
05/31/20100.42QFT 1
06/28/20100.40QFT 2
705/27/20100.61QFT 10 (05/11/2004)
05/27/20100.49QFT 1
05/27/20100.40QFT 1
06/03/20100.61QFT 2
06/03/20100.36QFT 2
806/03/20100.96QFT 18 mm (01/16/2001)
06/09/20101.04QFT 2
905/31/20100.64QFT 10 (03/23/2001)
05/31/20100.64QFT 1
06/07/20102.36QFT 2
06/07/20102.41QFT 2
1005/27/20101.46QFT 16 mmb (01/26/2001)
05/27/20100.83QFT 1
06/03/20100.86QFT 2
1106/10/20102.76QFT 16 mmc (01/23/2001)
06/22/20100.78QFT 2
1206/11/20103.19QFT 1None
06/11/20103.92QFT 1
06/23/20103.20QFT 2
1305/26/20105.27QFT 19 mm (02/06/2001)
05/26/20104.65QFT 1
05/31/20101.62QFT 2
05/31/20101.76QFT 2
  • a Previous tuberculin skin test (TST) (5 IU) results are also reported (expressed as millimeters of induration). The same date is shown for tests replicated on the same specimen; cutoff, 0.35 IU/ml.

  • b BCG vaccinated on 19 January 1995.

  • c BCG vaccinated on 29 June 1995.