From Latent Tuberculosis Infection to Tuberculosis. News in Diagnostics (QuantiFERON-Plus).

It is estimated that one third of the world's population have latent tuberculosis infection and that this is a significant reservoir for future tuberculosis cases. Most cases occur within two years following initial infection. The identification of individuals with latent tuberculosis infection is difficult due to the lack of an ideal diagnostic assay and incomplete understanding of latent infection.

Interferon gamma release assays based on M. tuberculosis-specific antigens in sarcoidosis patients.

Introduction: This study is a part of the project on interferon gamma release assays performed in the group of untreated sarcoidosis patients formerly BCG vaccinated. The aim of the study was to assess the rate of positive commercial interferon g release assays in sarcoidosis patients. We discussed the results in the context of hypothesis that M.

[Interferon-Gamma Release Assays in the diagnosis of latent tuberculosis infection in clinical situations].

Until recently, the basic test to identify latent tuberculosis infection (LTBI) was the tuberculin skin test, despite its limitations in the form of low sensitivity and specificity. Currently, Interferon Gamma Release Assays from peripheral blood are used for a rapid diagnosis of LTBI and measurement of the interferon gamma (IFN-g) levels secreted by specific T cells stimulated with Mycobacterium tuberculosis antigens. Detection of LTBI is important in the control of people potentially at risk of TB disease, such as people remaining in close contact with BK (+) tb patient and for patients evaluated for biological treatment.

[Interferon-gamma assays T-SPOT.TB for the diagnosis of latent tuberculosis infection].

Introduction: The diagnosis of latent tuberculosis infection (LTBI) is currently based on the century-old tuberculin skin test (TST). However a positive reaction can result from infection by Mycobacterium tuberculosis, BCG vaccination or cross-reaction with nontuberculous mycobacteria. T-SPOT.