A nil value of >8.0 IU/ml or a mitogen minus nil of <0.5 IU/ml was classified as indeterminate. QFT-GIT conversion or reversion was defined as respectively a negative to positive or a positive to negative change according to manufacturer’s criteria (ie, baseline IFN-γ <0.35 IU/ml and...
To determine differences in INF-γ levels in patients with conversion of QFT using the following critheria TB Antigen minus Nil, Mitogen minus Nil (IU/mL). Methods The latent Mycobacterium tuberculosis infection in blood was determined by QFT- G IT (IGRA - ELISA test with special blood ...
A nil value of >8.0 IU/ml or a mitogen minus nil of <0.5 IU/ml was classified as indeterminate. QFT-GIT conversion or reversion was defined as respectively a negative to positive or a positive to negative change according to manufacturer’s criteria (ie, baseline IFN-γ <0.35 IU/ml and...
igrajamainfectionltbinilmitogen Copyright2014AmericanMedicalAssociation.Allrightsreserved.Interferon-γReleaseAssaysfortheEvaluationofTuberculosisInfectionHenryM.Blumberg,MD;RussellR.Kempker,MD,MScAwomaninher20spresentsforfollow-upofatuberculinskintest(TST)placed2daysearlier.ThepatientisfromIndiaandarrivedintheUnited...
different risk groups) • Still somewhat complicated – Mitigated by software that performs calculations Interpretation Criteria for the QFT-GIT Test Nil (IU/mL) TB Antigen minus Nil (IU/mL) QFT-GIT (IU/mL) Mitogen Interpretation ≤ 8.0 ≤ 0.35 or < 25% of Nil value Negative ≥ 5.0 M....