cell-mediated hypersensitivity reaction

cell-mediated hypersensitivity reaction
type IV hypersensitivity r.

Medical dictionary. 2011.

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  • Type V hypersensitivity reaction — A Type V hypersensitivity reaction occurs when IgG class antibodies directed towards cell surface antigens have a stimulating effect on their target.Grave s disease is an example of this type of hypersensitivity reaction. This disease is also… …   Wikipedia

  • 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

  • Antibody-dependent cell-mediated cytotoxicity — An immune response in which antibody, by coating target cells, makes them vulnerable to attack by immune cells. Antibody dependent cell mediated cytotoxicity is commonly (and blissfully) abbreviated ADCC. * * * (ADCC), antibody dependent cellular …   Medical dictionary

  • Hypersensitivity pneumonitis — Classification and external resources Micrograph of hypersensitivity pneumonitis. Lung biopsy. Trichrome stain …   Wikipedia

  • reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …   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

  • Cell — The basic structural and functional unit in people and all living things. Each cell is a small container of chemicals and water wrapped in a membrane. Each cell in the human body there are 100 trillion cells in each of us contains the entire… …   Medical dictionary

  • 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 — 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

  • type II hypersensitivity — hypersensitivity resulting from antibody antigen interactions on cell surfaces; see type II hypersensitivity reaction, under hypersensitivity reaction, at reaction. Called also antibody mediated h …   Medical dictionary

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