TB Elimination: Tuberculin Skin Testing

This information sheet discusses TB testing using the Mantoux tuberculin skin test (TST) to determine whether an individual is infected with Mycobacterium TB. It discusses how the TST is administered, how it is read, how TST reactions are interpreted the classification of the TST skin test reaction, what are false-positive and false-negative reactions, who can receive a TST and how often the test can be repeated, what is a boosted reaction, why two-step testing is conducted, and whether TSTs can be given to persons receiving vaccinations. The sheet also includes a list of contacts for additional information.