Interferon Gamma Release Assay (Quantiferon)
Description:
Interferon Gamma Release Assays identify individuals with latent TB to enable treatment.
Clinical details:
QFTB
QuantiFERON™-TB Gold Plus is an indirect test for latent M. tuberculosis infection (LTBI) and M. tuberculosis complex infection. It is recommended for routine screening, contact studies and in patients with normal lymphocyte counts. In lymphopenic or immunosuppressed patients, or small volume paediatric samples (<4 mls blood) the alternative interferon gamma release assay, T-SPOT.TB test is recommended.
TSTB
T-SPOT.TB Gold is an indirect test for latent M. tuberculosis infection (LTBI) and M. tuberculosis complex infection. It is recommended for use in lymphopenic or immunosuppressed patients, or small volume paediatric samples (<4 mls blood). An alternative test, QuantiFERON™-TB Gold Plus, is recommended for use in all patients with normal lymphocyte counts.
QuantiFERON™-TB Gold Plus is an indirect test for latent M. tuberculosis infection (LTBI) and M. tuberculosis complex infection. It is recommended for routine screening, contact studies and in patients with normal lymphocyte counts. In lymphopenic or immunosuppressed patients, or small volume paediatric samples (<4 mls blood) the alternative interferon gamma release assay, T-SPOT.TB test is recommended.
TSTB
T-SPOT.TB Gold is an indirect test for latent M. tuberculosis infection (LTBI) and M. tuberculosis complex infection. It is recommended for use in lymphopenic or immunosuppressed patients, or small volume paediatric samples (<4 mls blood). An alternative test, QuantiFERON™-TB Gold Plus, is recommended for use in all patients with normal lymphocyte counts.
Reference range:
QFTB: <0.35
TSTB: ≥5
Synonyms or keywords:
Quantiferon, T-spot, tspot, t spot
Units:
QFTB: IU/ml
TSTB: spots
Department:
Location:
Last updated: 04/01/2021
