The PPD or Mantoux skin test checks the body's immune response to tuberculosis bacteria. It can be used for an exposure assessment or a school or workplace requirement.
A PPD test is also called a TB skin test, TST, or Mantoux test. Placement is the first visit; the test is not complete until trained staff read the reaction 48 to 72 hours later. TB blood testing, including QuantiFERON, uses a blood draw. CDC guidance prefers a TB blood test for people who received the BCG vaccine because BCG can affect a skin-test result.
If you have a cough lasting several weeks, fever, night sweats, unexplained weight loss, known TB exposure, or a prior positive TB test, tell the clinic before booking so the team can route you correctly. A positive TB test or TB symptoms may need clinician evaluation, chest X-ray review, or additional testing instead of a routine form-only visit.