SEARCHED TERM
Tuberculin skin test (TST)
DEFINITION
Intradermal injection of a combination of mycobacterial antigens that elicit an immune response (delayed-type hypersensitivity), represented by induration, which can be measured in millimeters. TST is used to diagnose M. tuberculosis infection.
RELATED TERMS
MORE INFO
SOURCE DEFINITION
Intradermal injection of a combination of mycobacterial antigens that elicit an immune response (delayed-type hypersensitivity), represented by induration, which can be measured in millimetres. TST is used to diagnose TB infection.
OTHER DEFINITIONS
Skin test to assess infection with the TB organism, whereby purified protein derivative (PPD) is injected intradermally to identify people who have been sensitized to mycobacterial antigens by infection with M. tuberculosis, non-tuberculous mycobacteria or vaccination with BCG
Cutaneous (intradermal) injection of PPD to identify people who have been sensitized to mycobacterial antigens by infection with M. tuberculosis, non-tuberculous mycobacteria or vaccination with BCG
Method use to assess the likelihood that a person is infected with M. tuberculosis. A small dose of PPD-tuberculin is injected just beneath the surface of the skin by the Mantoux method, and the area is examined 48–72 hours after the injection. The indurated margins should be read transverse (i.e., perpendicular) to the long axis of the forearm.
Diagnostic aid for finding M. tuberculosis infection. A small dose of tuberculin (see also Mantoux method and PPD) is injected just beneath the surface of the skin by the Mantoux method, and the area is examined for induration by palpation 48–72 hours after the injection. Indurated margins should be read transverse (perpendicular) to the long axis of the forearm
CLOSE
