Table 3

IFN-γ levels in 5 laboratory health care workers whose QuantiFERON-TB Gold In-Tube test results reverted to negative 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
105/27/20100.36QFT 10 (05/11/2004)
05/27/20100.45QFT 1
06/03/20100.07QFT 2
06/03/20100.19QFT 2
206/11/20100.63QFT 10 (01/11/2002)
06/11/20100.68QFT 1
07/08/20100.02QFT 2
306/11/20100.77QFT 10 (04/27/2004)
06/11/20100.86QFT 1
06/28/20100.01QFT 2
406/11/20100.99QFT 17 mmb (01/26/2001)
06/11/20101.10QFT 1
06/28/20100.12QFT 2
505/31/20101.87QFT 1None
05/31/20101.63QFT 1
06/07/20100.31QFT 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 03 February 1989 and 26 November 1997.