Clinical value of interferon-γ release assay in the diagnosis of active tuberculosis

Experimental and Therapeutic Medicine
Lu AiHongxu Xu

Abstract

Sensitivity and specificity of the interferon-γ release test for active tuberculosis screening were evaluated. Due to the high-test cost of imported IGRAs, QFT-GIT and T-SPOT.TB, we applied a cheaper domestic TB-IGRA which was approved in China recently. We recruited 740 patients and performed tuberculosis interferon release test (IGRAs), detection of Mycobacterium tuberculosis IgG antibody (TB-IgG) and tuberculin skin test (TST). The sensitivity of the three methods are 90.8, 40.0 and 75.45%, with specificity of 76.62, 74.47 and 72.27%. The area under the ROC curve according to the value of T-N detected by IGRAs was 0.878 (95% CI, 0.839-0.917), with the area under the curve for the diagnosis of active pulmonary tuberculosis and extrapulmonary tuberculosis being 0.839 and 0.841 respectively. The interferon-γ release test seems to be superior to TST and TB-IgG as a screening tool for the detection of active tuberculosis in China.

References

Sep 29, 2000·Lancet·P AndersenT M Doherty
Apr 2, 2011·Journal of Neurology·Sharma KusumSharma Meera
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Mar 6, 2018·Microbiology and Immunology·Xiao ZhangJiangjun Ma

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