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The two types of tests for TB infection are:

  • a skin test (TST).
  • a blood test.

For a skin test, medical staff inject a very small amount of test liquid (not TB bacteria) into a person’s arm. Medical staff then read the test 2-3 days later by looking for a reaction.

For a TB blood test, you will have blood drawn. It requires only one visit and the results usually are available within one week.