Comparison of Two Commercially Available Gamma Interferon Blood Tests for Immunodiagnosis of Tuberculosis

Author:

Domínguez Jose12345,Ruiz-Manzano Juan12345,De Souza-Galvão Malú12345,Latorre Irene12345,Milà Celia12345,Blanco Silvia12345,Jiménez M. Ángeles12345,Prat Cristina12345,Lacoma Alicia12345,Altet Neus12345,Ausina Vicente12345

Affiliation:

1. Servei de Microbiologia

2. Servei de Pneumologia, Hospital Universitari Germans Trias i Pujol, Fundació Institut en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain

3. Universitat Autònoma de Barcelona, Bellaterra, Spain

4. Ciber Enfermedades Respiratorias, Instituto de Salud Carlos III, Badalona, Spain

5. Unidad de Prevención y Control de la Tuberculosis de Barcelona, Barcelona, Spain

Abstract

ABSTRACT We evaluated the T-SPOT.TB and Quantiferon-TB Gold In tube (QFN-G-IT) tests for diagnosing Mycobacterium tuberculosis infection. T-SPOT.TB was more sensitive than QFN-G-IT in diagnosing both active and latent infection. Both gamma interferon tests were unaffected by prior Mycobacterium bovis BCG vaccination. Among children who were not BCG vaccinated but had a positive tuberculin skin test, QFN-G-IT was negative in 53.3% of cases, and T-SPOT.TB was negative in 50% of cases.

Publisher

American Society for Microbiology

Subject

Microbiology (medical),Clinical Biochemistry,Immunology,Immunology and Allergy

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