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About: Type IV hypersensitivity     Goto   Sponge   NotDistinct   Permalink

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Type: ThingFuchs' dystrophyyago:Abstraction100002137yago:Attribute100024264yago:Condition113920835yago:Disease114070360yago:IllHealth114052046yago:Illness114061805yago:PathologicalState114051917yago:PhysicalCondition114034177diseaseyago:State100024720 New Facet based on Instances of this Class

Type IV hypersensitivity, often called delayed-type hypersensitivity, is a type of hypersensitivity reaction that can take a day or more to develop. Unlike the other types, it is not humoral (not antibody-mediated) but rather is a type of cell-mediated response. This response involves the interaction of T cells, monocytes, and macrophages. The overreaction of the helper T cells and overproduction of cytokines damage tissues, cause inflammation, and cell death. Type IV hypersensitivity can usually be resolved with topical corticosteroids and trigger avoidance.