delayed-type hypersensitivity

Dictionary of molecular biology. 2004.

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  • delayed-type hypersensitivity response — DTH. An inflammatory response that develops 24 to 72 hours after exposure to an antigen that the immune system recognizes as foreign. This type of immune response involves mainly T cells rather than antibodies (which are made by B cells) …   English dictionary of cancer terms

  • tuberculin-type hypersensitivity — delayed h …   Medical dictionary

  • Type IV hypersensitivity — Classification and external resources MeSH D006968 Type IV hypersensitivity is often called delayed type hypersensitivity as the reaction takes two to three days to develop. Unlike the other types, it is not antibody mediated but rather is a type …   Wikipedia

  • delayed hypersensitivity — de·layed hypersensitivity di .lād n hypersensitivity (as in a tuberculin test) which is mediated by T cells and in which the typical symptoms of inflammation and induration appear in an individual previously exposed to an antigen after an… …   Medical dictionary

  • hypersensitivity — In immunology, a state of excessive and potentially damaging immune responsiveness as a result of previous exposure to antigen. If the hypersensitivity is of the immediate type (antibody mediated), then the response occurs in minutes; in delayed… …   Dictionary of molecular biology

  • Delayed sleep phase syndrome — Classification and external resources ICD 10 G47.2 ICD 9 327.31 …   Wikipedia

  • type IV hypersensitivity — hypersensitivity initiated by antigen specific T lymphocytes; unlike forms mediated by antibodies, it takes one or more days to develop and can be transferred by lymphocytes but not by serum. The term is often equated with delayed… …   Medical dictionary

  • hypersensitivity — Abnormal sensitivity, a condition in which there is an exaggerated response by the body to the stimulus of a foreign agent. See allergy. contact h. 1. SYN: contact dermatitis. 2. SYN: delayed reaction. delayed h. 1 …   Medical dictionary

  • delayed hypersensitivity reaction — a reaction of cell mediated immunity, named in contrast to immediate hypersensitivity reactions because its onset is 24 to 72 hours after the antigenic challenge; the term is usually used to denote the subset of type IV hypersensitivity reactions …   Medical dictionary

  • type IV hypersensitivity — A delayed hypersensitivity response (it appears 24 to 48 hours after antigen exposure). It results from the binding of antigen to activated T lymphocytes, which then release cytokines and trigger inflammation and macrophage attacks that damage… …   Dictionary of microbiology

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