Tuberculosis (TB) Diagnosis
Tuberculosis skin test facts
- The tuberculosis skin test is also known as the tuberculin test or PPD test.
- The PPD test is used to determine if someone has developed an immune response to the bacterium that causes tuberculosis (TB).
- The standard recommended tuberculin test is the Mantoux test, which is administered by injecting a 0.1 mL volume containing 5 TU (tuberculin units) PPD into the top layers of skin of the forearm.
- Skin tests should be read 48-72 hours after the injection.