The Mantoux test, also known as the Tuberculin Skin Test (TST) or PPD test, is a quick and accurate diagnostic procedure that detects tuberculosis (TB) infection.During the test, a small amount of purified protein derivative (PPD) is injected just beneath the skin of your forearm. After 48 to 72 hours, a healthcare professional examines the site for any swelling or redness. If there’s a reaction, it may indicate exposure to TB bacteria. This test helps identify both active and latent (hidden)...