Latent tuberculosis infection (LTBI) is an asymptomatic mycobacterial infection defined on the basis of cellular immune responses to mycobacterial antigens. Currently, the tuberculin skin test (TST) and interferon gamma release assay (IGRA) are used to diagnose LTB. However, neither TST nor his IGRA are useful in distinguishing between active and latent TB. Furthermore, these tests […]
