Evaluation of interferon-γ release assay in the diagnosis of osteoarticular tuberculosis
- PMID: 23647965
- DOI: 10.1016/j.diagmicrobio.2013.03.030
Evaluation of interferon-γ release assay in the diagnosis of osteoarticular tuberculosis
Abstract
The aim of this study was to assess the value of interferon-γ (IFN-γ) release assay (IGRA) (T-SPOT.TB) for patients with suspected osteoarticular tuberculosis (TB) in comparison with conventional and molecular methods. Of 145 patients with suspected osteoarticular TB, recruited from Beijing Chest Hospital between July 2011 and June 2012, 86 (59.3%)had osteoarticular TB (26 with culture-confirmed TB, 60 with probable TB), 24 (16.6%) were not having active TB. The remaining 17 (11.7%) inconclusive TB and 18 (12.4%) possible TB were excluded from final analysis. In addition to conventional tests and molecular method, T-SPOT.TB assay using peripheral blood mononuclear cells to examine IFN-γ response to early secretory antigenic target 6 and culture filtrate protein 10 was also performed. The sensitivity and specificity for T-SPOT.TB assay were 94.2% and 70.8%, respectively. A statistically significant difference in sensitivity was found between T-SPOT.TB assay (94.2%) and other tests (acid-fast bacilli smear (19.7%), culture (34.2%), real-time PCR (36.8%); P < 0.01, respectively). These results suggested that the IGRA assay could provide useful aids in the diagnosis of osteoarticular TB.
Copyright © 2013 Elsevier Inc. All rights reserved.
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