Use of an Interferon-{gamma} Release Assay To Diagnose Latent Tuberculosis Infection in Foreign-Born Patients.

Use of an Interferon-{gamma} Release Assay To Diagnose Latent Tuberculosis Infection in Foreign-Born Patients. Research Abstract Details 

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Use of an Interferon-{gamma} Release Assay To Diagnose Latent Tuberculosis Infection in Foreign-Born Patients. Abstract Text:

BACKGROUND: The tuberculin skin test (TST) has a low specificity in the setting of bacille Calmette-Guérin (BCG) vaccination. Interferon-gamma release assays (IGRAs) appear to be more specific but have not been validated in this population under routine clinical conditions. We sought to validate the routine clinical use of the T-SPOT.TB test (Oxford Immunotec; Oxford, UK), an IGRA, in a predominantly foreign-born population with a high rate of BCG vaccination. METHODS: We compared the TST and the T-SPOT.TB test in 96 subjects at a New York City Department of Health tuberculosis clinic. We aimed to determine which test better predicted being a close contact of a case of active tuberculosis, a surrogate for latent tuberculosis infection. RESULTS: A positive T-SPOT.TB test result was strongly associated with being a close contact of a case of active tuberculosis after adjustment for potential confounders (adjusted odds ratio, 2.9; 95% confidence interval, 1.1 to 7.3; p = 0.03). A positive TST result was associated with being a contact only in subjects without BCG vaccination (p = 0.02). The T-SPOT.TB test was more specific for being a close contact than the TST (p < 0.001). Specificity in BCG-vaccinated subjects was 3% for the TST compared with 70% for the T-SPOT.TB test (p < 0.001). CONCLUSIONS: The T-SPOT.TB test is superior in routine clinical use to the TST for identifying high-risk individuals among foreign-born populations with high rates of BCG vaccination.

Use of an Interferon-{gamma} Release Assay To Diagnose Latent Tuberculosis Infection in Foreign-Born Patients. Publishing Authors By Initials

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Use of an Interferon-{gamma} Release Assay To Diagnose Latent Tuberculosis Infection in Foreign-Born Patients. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Chest

VOLUME: 133

Page Numbers: 869-74

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ISSN: 0012-3692

DAY: 15

MONTH: 01

YEAR: 2008

Use of an Interferon-{gamma} Release Assay To Diagnose Latent Tuberculosis Infection in Foreign-Born Patients. Information

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LANGUAGE: eng

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AFFILIATION: Columbia University Medical Center, 622 West 168th St, PH 8 East, Room 101, New York, NY 10032. ns311@columbia.edu.

Country: United States

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MEDLINETA: Chest

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