Interferon gamma test (IGRAs) - blood tuberculosis test is a modern medical test method, helping doctors diagnose tuberculosis infection (Mycobacterium tuberculosis) right at the latent tuberculosis stage when there is no chance of infection and limit the level of lung damage for the patient.

A normal person infected with Mycobacterium tuberculosis bacteria may not have any symptoms, this is called latent tuberculosis infection and is not contagious to others. However, the bacteria can still progress to pulmonary tuberculosis. In this case, the IFN gamma test is used to diagnose and detect tuberculosis early.