(skin test) A preparation of an antigenic component of an infectious agent that is administered to a patient in order to determine whether previous exposure to the agent has occurred, and/or to assess the integrity of the patient's cellular immune system. Depending on the clinical situation, the appearance of a delayed (cellular) hypersensitivity response, which manifests as an area of induration and erythema at the injection site, i.e. a positive test result, may indicate previous exposure to a particular infectious agent. (NCI04)

(skin test) A test for an immune response to a compound by placing it on or under the skin.

(immunologic skin test) Epicutaneous or intradermal application of a sensitizer for demonstration of either delayed or immediate hypersensitivity; used in diagnosis of hypersensitivity or as a test for cellular immunity.

Skin test, introduction of a specific test substance into the skin of an individual, either by injection or by scratching the skin, to determine that individual's possible allergy to certain substances or his susceptibility or immunity to certain diseases. A skin test is usually considered...