Gamma interferon.negative control spot count:Num:Pt:Bld:Qn: - CISMeF
Gamma interferon.negative control spot count:Num:Pt:Bld:Qn:LOINC code
Preferred Label : Gamma interferon.negative control spot count:Num:Pt:Bld:Qn:;
LOINC status : ACTIVE;
LOINC display name : Gamma interferon negative control spot count (Bld) [#];
LOINC long common name : Gamma interferon negative control spot count [#] in Blood;
LOINC short name : IGNF neg cntrl Bld;
LOINC description : The count of negative control spots (0 to 20) in a patient's T cells incubated without
M. tuberculosis antigens (ESAT-6, CFP10). This term is created for, but not limited
in use to, Oxford Immunotec's T-SPOT.TB assay, used to diagnose M. tuberculosis. T-SPOT.TB
assay uses enzyme-linked immunospot (ELISPOT) methodology to enumerate M. tuberculosis-sensitized
T cells by capturing interferon-gamma (IFN-y) in the vicinity of T cells in the patient's
whole blood. In the T-SPOT.TB test, a typical result is expected to have few to no
spots in the negative (nil) control and 20 or more spots in the positive control (Mitogen
stimulated). A negative control spot count of 10 is considered invalid.;