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Serial interferon-gamma release assays during treatment of active tuberculosis in young adults

Cited 39 time in Web of Science Cited 42 time in Scopus
Issue Date
2010-10-16
Publisher
BIOMED CENTRAL LTD
Citation
BMC INFECTIOUS DISEASES; Vol.10; 300
Abstract
Background: The role of interferon-gamma release assay (IGRA) in monitoring responses to anti-tuberculosis (TB) treatment is not clear. We evaluated the results of the QuantiFERON-TB Gold In-tube (QFT-GIT) assay over time during the anti-TB treatment of adults with no underlying disease. Methods: We enrolled soldiers who were newly diagnosed with active TB and admitted to the central referral military hospital in South Korea between May 1, 2008 and September 30, 2009. For each participant, we preformed QFT-GIT assay before treatment (baseline) and at 1, 3, and 6 months after initiating anti-TB medication. Results: Of 67 eligible patients, 59 (88.1%) completed the study protocol. All participants were males who were human immunodeficiency virus (HIV)-negative and had no chronic diseases. Their median age was 21 years (range, 20-48). Initially, 57 (96.6%) patients had positive QFT-GIT results, and 53 (89.8%), 42 (71.2%), and 39 (66.1%) had positive QFT-GIT results at 1, 3, and 6 months, respectively. The IFN-gamma level at baseline was 5.31 +/- 5.34 IU/ml, and the levels at 1, 3, and 6 months were 3.95 +/- 4.30, 1.82 +/- 2.14, and 1.50 +/- 2.12 IU/ml, respectively. All patients had clinical and radiologic improvements after treatment and were cured. A lower IFN-gamma level, C-reactive protein >= 3 mg/dl, and the presence of fever (>= 38.3 degrees C) at diagnosis were associated with negative reversion of the QFT-GIT assay. Conclusion: Although the IFN-gamma level measured by QFT-GIT assay decreased after successful anti-TB treatment in most participants, less than half of them exhibited QFT-GIT reversion. Thus, the reversion to negativity of the QFT-GIT assay may not be a good surrogate for treatment response in otherwise healthy young patients with TB.
ISSN
1471-2334
Language
English
URI
https://hdl.handle.net/10371/77372
DOI
https://doi.org/10.1186/1471-2334-10-300
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College of Medicine/School of Medicine (의과대학/대학원)Internal Medicine (내과학전공)Journal Papers (저널논문_내과학전공)
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