88518-6
LaboratoryMycobacterium tuberculosis stimulated gamma interferon release by CD4+ and CD8+ T-cells [Units/volume] in Blood
Definition
The quantitative levels (uncorrected for background) for an IFN-gamma response by CD4+ T-helper and CD8+ T cytotoxic lymphocytes stimulated by the presence of TB antigens, specifically ESAT-6 and CFP-10. This term was created for, but not limited in use to, the QuantiFERON-TB Gold Plus test, which includes two tubes with the Mycobacterium tuberculosis (MTB)-complex-associated antigens ESAT-6 and CFP-10 that stimulate a cell-mediated immunity (CMI) response. The first tube contains antigens that stimulate a response from CD4+ T-helper lymphocytes [LOINC: 64084-7], and the second tube (this term) contains the antigens included in tube 1 as well as an additional set of peptides targeting the CMI response from CD8+ cytotoxic T lymphocytes. In the QuantiFERON-TB Gold Plus test, the amount of IFN-gamma is measured by enzyme-linked immunosorbent assay and reported in IU/mL. Results are adjusted for background, heterophile antibody effects, or nonspecific IFN-gamma in blood samples.
LOINC 6-Axis Classification
Component
Mycobacterium tuberculosis stimulated gamma interferon release by CD4+ and CD8+ T-cells
Property
ACnc
Time Aspect
Pt
System
Bld
Scale Type
Qn
Method Type
N/A
Details
Class
MICRO
Order/Observation
Both
Short Name
M TBIFN-g CD4+ CD8+T-cells Bld-aCnc
Display Name
M. tuberculosis stim IFN-g by CD4+ CD8+ T-cells Qn (Bld)
Related Names
Frequently Asked Questions
What is LOINC code 88518-6?
LOINC code 88518-6 identifies "Mycobacterium tuberculosis stimulated gamma interferon release by CD4+ and CD8+ T-cells [Units/volume] in Blood". The quantitative levels (uncorrected for background) for an IFN-gamma response by CD4+ T-helper and CD8+ T cytotoxic lymphocytes stimulated by the presence of TB antigens, specifically ESAT-6 and CFP-10. This term was created for, but not limited in use to, the QuantiFERON-TB Gold Plus test, which includes two tubes with the Mycobacterium tuberculosis (MTB)-complex-associated antigens ESAT-6 and CFP-10 that stimulate a cell-mediated immunity (CMI) response. The first tube contains antigens that stimulate a response from CD4+ T-helper lymphocytes [LOINC: 64084-7], and the second tube (this term) contains the antigens included in tube 1 as well as an additional set of peptides targeting the CMI response from CD8+ cytotoxic T lymphocytes. In the QuantiFERON-TB Gold Plus test, the amount of IFN-gamma is measured by enzyme-linked immunosorbent assay and reported in IU/mL. Results are adjusted for background, heterophile antibody effects, or nonspecific IFN-gamma in blood samples.
What does 88518-6 measure?
This code measures Mycobacterium tuberculosis stimulated gamma interferon release by CD4+ and CD8+ T-cells in Bld. It belongs to the MICRO class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.