Type IV hypersensitivity reaction

Definition: Delayed hypersensitivity reaction (DTH) - type IV reaction, an inflammatory response that develops 24 to 72 hours after exposure to an antigen that the immune system recognizes as foreign. DTH is mediated by T cells rather than by antibodies. Th1 cells produce interferon gamma, interleukin (IL)-2, and tumor necrosis factor-beta and promote a cell-mediated immune response.

Synonyms (terms occurring on more labels are shown first): delayed hypersensitivity, delayed hypersensitivity reactions, delayed type hypersensitivity, delayed hypersensitivity reaction, cell mediated immunological reaction

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