Usefulness of the QuantiFERON TB-2G Test for the Differential Diagnosis of Pulmonary Tuberculosis
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概要
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Objective We prospectively evaluated the usefulness of the QuantiFERON TB-2G (QFT-2G) compared to that of tuberculin skin test (TST) as a supportive method of diagnosing pulmonary tuberculosis (TB) without invasive examinations. Methods The subjects were 90 patients who required differentiation of pulmonary TB clinically and for whom a definitive diagnosis could not be obtained after admission. The final clinical diagnosis of TB infection in 28 patients and non-TB infection in 62 patients was established using bronchoscopic procedures. Results In patients with TB infection, the positive response rate on QFT-2G (79%) was significantly higher than that on TST (57%). The QFT-2G negative rate (5%) was significantly lower than that on TST (48%) in patients with non-TB infection. For QFT-2G test, there was a positive response in 25 patients, a negative response in 49, and indeterminate findings in 16. Of the two patients with a false-negative result on QFT-2G, one had pulmonary TB during immunosuppressive treatment and one had pulmonary tuberculoma. Of the three non-TB patients with a positive result on QFT-2G, two had pneumonia and one had pulmonary mycosis. Four TB patients with an indeterminate result on QFT-2G included two elderly patients and two immunocompromised patients. Conclusions We could confirm the usefulness of the QFT-2G test compared to TST in patients requiring a differential diagnosis between pulmonary TB and other pulmonary diseases in this series. Therefore, we recommend the QFT-2G test as one of the useful noninvasive diagnostic examinations for pulmonary TB.
著者
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Fukuda Minoru
Division Of Respiratory Diseases Department Of Medicine Kawasaki Medical School
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Oka Mikio
Division Of Respiratory Diseases Department Of Medicine Kawasaki Medical School
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YAGI Shinichi
Division of Respiratory Diseases, Department of Medicine, Kawasaki Medical School
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Obase Yasushi
Division Of Respiratory Diseases Department Of Medicine Kawasaki Medical School
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Kobashi Yoshihiro
Division Of Respiratory Disease Department Of Medicine Kawasaki Medical School
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Mouri Keiji
Division of Respiratory Disease, Department of Medicine, Kawasaki Medical School, Japan
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Miyashita Naoyuki
Division of Respiratory Disease, Department of Medicine, Kawasaki Medical School, Japan
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Obase Yasushi
Division of Respiratory Disease, Department of Medicine, Kawasaki Medical School, Japan
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