Published ahead of print on April 1, 2004, doi:10.1164/rccm.200402-179OC
Am. J. Respir. Crit. Care Med., Volume 170, Number 1, July 2004, 59-64
A more recent version of this article appeared on July 1, 2004
Submitted on February 10, 2004
Accepted on March 26, 2004
Specific Detection of Tuberculosis Infection with an Interferon-gamma Based Assay Using New Antigens
Toru Mori1*, Mitsunori Sakatani2, Fumio Yamagishi3, Tetsuya Takashima4, Yoshiko Kawabe5, Keiji Nagao6, Eriko Shigeto7, Nobuyuki Harada1, Satoshi Mitarai1, Masaji Okada2, Katsuhiro Suzuki2, Yoshikazu Inoue2, Kazunari Tsuyuguchi2, Yuka Sasaki3, Gerald H Mazurek8, and Izuo Tsuyuguchi4
1 Research Institute of Tuberculosis, Tokyo, Japan,
2 National Kinki Chuo Hospital for Chest Diseases, Osaka, Japan,
3 National Chiba Higashi Hospital, Chiba, Japan,
4 Osaka Prefectural Habikino Hospital, Osaka, Japan,
5 National Tokyo Hospital, Tokyo, Japan,
6 Chiba University School of Medicine, Chiba, Japan,
7 National Hiroshima Hospital, Hiroshima, Japan,
8 Centers for Disease Control and Prevention, Altlanta, GA, USA
* To whom correspondence should be addressed. E-mail: tmori{at}jata.or.jp.
The tuberculin skin test for immunologic diagnosis of Mycobacterium tuberculosis infection has many limitations, including being confounded by Bacillus Calmette-Guerin (BCG) vaccination or exposure to non- tuberculous mycobacteria. M. tuberculosis-specific antigens that are absent from BCG and most non-tuberculous mycobacteria have recently been identified. We examined the use of two of these antigens, CFP-10 and ESAT-6, in a whole blood interferon-g assay as a diagnostic test for tuberculosis in BCG vaccinated individuals. Due to lack of an accurate standard with which to compare new tests for M. tuberculosis infection, specificity of the whole blood interferon-g assay was estimated using data from people with no identified risk for M. tuberculosis exposure (216 BCG vaccinated Japanese adults) and sensitivity was estimated using data from 118 patients with culture confirmed M. tuberculosis infection who had received less than one week of treatment. Using a combination of CFP-10 and ESAT-6 responses, the specificity of the test in the low risk people was 98.1% and the sensitivity in patients with M. tuberculosis infection was 89.0%. The results demonstrate that the whole blood IFN- assay using CFP-10 and ESAT-6 was highly specific and sensitive for M. tuberculosis infection and was unaffected by BCG vaccination status.
Key words: Tuberculosis, Diagnostics, Infection, Interferon-gamma, BCG
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Peripheral T Cell Interferon-{gamma} Responses and Latent Tuberculosis
Am. J. Respir. Crit. Care Med.,
July 1, 2004;
170(1):
97 - 98.
[Full Text]
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C. H. Hayden, B. T. Mangura, I. Channer, G. E. Patterson, M. R. Passannante, and L. B. Reichman
Tuberculin Testing and Treatment of Latent TB Infection Among Long term Jail Inmates
Journal of Correctional Health Care,
January 1, 2004;
11(1):
99 - 117.
[Abstract]
[PDF]
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Copyright © 2004 American Thoracic Society
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