S-Space College of Medicine/School of Medicine (의과대학/대학원) Laboratory Medicine (검사의학전공) Journal Papers (저널논문_검사의학전공)
Usefulness of the whole-blood interferon-gamma release assay for diagnosis of extrapulmonary tuberculosis
- Song, Kyoung-Ho; Jeon, Jae Hyun; Park, Wan Beom; Kim, Sung-Han; Kim, Nam Joong; Kim, Hong Bin; Choe, Kang Won; Oh, Myoung-don; Park, Kyoung Un
- Issue Date
- ELSEVIER SCIENCE INC
- DIAGNOSTIC MICROBIOLOGY AND INFECTIOUS DISEASE; Vol.63 2; 182-187
- The whole-blood interferon-gamma enzyme-linked immunosorbent assay (QuantiFERON-TB Gold [QFT-G]; Cellestis, Carnegie, Australia) has been studied mainly for diagnosing active pulmonary tuberculosis (TB) or latent TB. We prospectively evaluated its diagnostic usefulness in patients Suspected with extrapulmonary TB (EP-TB). Of the 100 adult patients with suspected EP-TB, 43 were classified as "confirmed" EP-TB and 5 as "probable" EP-TB. Of the 48 with EP-TB, 27 (56%) were diagnosed with TB lymphadenitis and 11 (17%) with skeletal TB. The overall sensitivity and specificity of the assay were 69% (95% confidence interval [CI(95)], 53-81%) and 82% (CI(95), 69-91%), respectively. Among 44 patients presented with cervical lymphadenopathy, the QFT-G assay showed 86% (CI(95), 64-97%) sensitivity and 87% (CI(95), 66-97%) specificity, whereas in 28 with skeletal involvement, the sensitivity and specificity of the assay were 45% (CI(95), 17-77%) and 81% (CI(95), 54-96%), respectively. These suboptimal diagnostic performances suggest that the QFT-G assay alone is not sufficient for the diagnosis of EP-TB. (c) 2009 Elsevier Inc. All rights reserved.
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