Definition: a method for determining induced sensitivity (allergy) by applying an antigen (allergen) to, or inoculating it into, the skin; induced sensitivity (allergy) to the specific antigen is indicated by an inflammatory reaction of one of two general kinds: 1) immediate, appears in minutes and is dependent on circulating immunoglobulins (antibodies); 2) delayed, appears in 12–48 hours and is not dependent on these soluble substances but on cellular response and infiltration.
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Examples: glitazone, GI cocktail, etc.