type I hypersensitivity
A form of immediate hypersensitivity arising from the binding of antigen to IgE attached to mast cells, which then release anaphylaxis mediators such as histamine. Examples: hay fever, asthma, and food allergies.

Microbiology. . 2009.

Look at other dictionaries:

  • type I hypersensitivity — hypersensitivity that occurs rapidly (within several minutes) upon reexposure to an antigen, due to interaction of IgE and the antigen; see type I hypersensitivity reaction, under hypersensitivity reaction, at reaction …   Medical dictionary

  • Type I hypersensitivity — Infobox Disease Name = Type I hypersensitivity Caption = SEM of miscellaneous plant pollens. Pollens are very common allergens. DiseasesDB = ICD10 = ICD9 = ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D006969 Type I… …   Wikipedia

  • 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

  • type I — a hypersensitivity reaction that occurs within minutes when a sensitized individual is reexposed to antigen, resulting from interaction of IgE and the antigen; clinical manifestations can range from localized dermatitis, urticaria, or angioedema… …   Medical dictionary

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

  • Type 2 — or Type II may refer to:* Type 2 20 mm AA Machine Cannon, a Japanese weapon * Type 2 AT mine * Type 2 cannon, a 30 mm Japanese weapon * Type 2 encryption * Type 2 Gumbel distribution * Type 2 Ho I, a Japanese tank * Type 2 Ka Mi, a Japanese tank* …   Wikipedia

  • 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

  • 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

  • type IV — a reaction of cell mediated immunity, the immune response being initiated by antigen specific T lymphocytes; in contrast to the reactions of immediate hypersensitivity, reactions take one or more days to develop and can be transferred by… …   Medical dictionary

  • Hipersensibilidad tipo I — Type I hypersensitivity Clasificación y recursos externos MeSH D006969 …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”