Comparative study of concordance and costs between tuberculin skin test and QuantiFERON(®)-TB Gold In-Tube in the diagnosis of latent tuberculosis infection among contacts of patients with pulmonary tuberculosis

Medicina clínica
Xavier Martinez LacasaJosep Lite Lite

Abstract

Recently diagnosis of latent tuberculosis infection (LTBI) can be made using the tuberculin skin test (TST) or by techniques known as interferon-γ release assays (IGRAS), being QuantiFERON(®)-TB Gold In-Tube (QF-G-IT) the most used. The IGRAS avoid some drawbacks of the TST, especially cross-reaction with bacillus Calmette-Guérin (BCG) vaccine, but also present some problems such as those arising from cost and the need of having an adequate infrastructure and experience. There is no clear consensus on which technique should be preferentially used for the diagnosis of LTBI. This is a comparative study between the TST and QT-G-IT in a cohort of contacts of patients with pulmonary tuberculosis during the study period. An analysis of global agreement and groups was performed according to whether the contacts were vaccinated with BCG or not. A study of costs of both techniques and diagnostic strategies based on these techniques was performed. The agreement between TST and QF-G-IT was acceptable in the whole sample yet it was very good in the unvaccinated group. Few cases of indeterminate values were recorded. The cost study showed that TST was cheaper than QF-G-IT; however when we analyzed the cost of the strategies according to eac...Continue Reading

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Citations

Oct 10, 2013·Anales de pediatría : publicación oficial de la Asociación Española de Pediatría (A.E.P.)·L Armando García-MirandaJ A Estrada
Mar 20, 2013·Archives of Medical Research·Carmen Judith Serrano-EscobedoJoel Monárrez-Espino

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