Bleb, bleb, go away, come back again another day... or don’t 💉 💉Mantoux tuberculin skin test (TST) Screening tool to assess for tuberculosis (TB) or latent infection. A small amount of tuberculin is injected beneath the skin and forms a bleb, which is expected! ➕🟢 Positive ( ) test ≥ 5mm, redness, raised, hard, swelling where fluid was injected Indicates the patient was exposed to TB & further testing is needed ➖🔴Negative (-) test No bump or a tiny bump “bleb” where fluid was injected Indica