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What (who) is hypersensitivity$36802$ - definition
AN INFLAMMATORY RESPONSE DRIVEN BY ANTIGEN RECOGNITION BY ANTIBODIES BOUND TO FC RECEPTORS ON MAST CELLS OR BASOPHILS, OCCURRING WITHIN MINUTES AFTER EXPOSURE OF A SENSITIZED INDIVIDUAL TO THE ANTIGEN
Hypersensitivity, immediate; Type 1 hypersensitivity; Respiratory hypersensitivity; Type-I hypersensitivity; Immediate hypersensitivity; Type I (immediate) hypersensitivity; T1hs; T1HS
Hypersensitivity
INFLAMMATORY RESPONSE TO AN EXOGENOUS ENVIRONMENTAL ANTIGEN OR AN ENDOGENOUS ANTIGEN INITIATED BY THE ADAPTIVE IMMUNE SYSTEM
Gell-Coombs classification; Hypersensitivities; Hyper-sensitivity; Type V hypersensitivity; Hypersensitivity response; Hypersensitivity reaction; Type V hypersensitivity reaction; Dth response; Gell–Coombs classification; Type 5 hypersensitivity; Hypersensitivity reactions; Immune hypersensitivity; Types of hypersensitivity
Hypersensitivity (also called hypersensitivity reaction or intolerance) refers to undesirable reactions produced by the normal immune system, including allergies and autoimmunity. They are usually referred to as an over-reaction of the immune system and these reactions may be damaging and uncomfortable.
Type IV hypersensitivity
INFLAMMATORY RESPONSE DRIVEN BY T CELL RECOGNITION OF PROCESSED SOLUBLE OR CELL-ASSOCIATED ANTIGENS, LEADING TO CYTOKINE RELEASE AND LEUKOCYTE ACTIVATION
Type IV hypersensitivity reaction; Type IV Hypersensitivity; Delayed-Type Hypersensitivity; Type IV delayed hypersensitivity reaction; Type 4 hypersensitivity; Delayed-type hypersensitivity response; Delayed hypersensitivity; Type IV (delayed) hypersensitivity; Delayed-type hypersensitivity; Delayed type hypersensitivity; Type-IV hypersensitivity; Type IV allergy; Type IV allergies
Type IV hypersensitivity, often called delayed-type hypersensitivity, is a type of hypersensitivity reaction that takes several days to develop. Unlike the other types, it is not humoral (not antibody-mediated) but rather is a type of cell-mediated response.
Type I hypersensitivity
Type I hypersensitivity (or immediate hypersensitivity) is an allergic reaction provoked by re-exposure to a specific type of antigen referred to as an allergen. Type I is distinct from type II, type III and type IV hypersensitivities.
Wikipedia
Type I hypersensitivity
Type I hypersensitivity (or immediate hypersensitivity), in the Gell and Coombs classification of allergic reactions, is an allergic reaction provoked by re-exposure to a specific type of antigen referred to as an allergen. Type I is distinct from type II, type III and type IV hypersensitivities. The relevance of the Gell and Coombs classification of allergic reactions has been questioned in the modern-day understanding of allergy, and it has limited utility in clinical practice.
Exposure may be by ingestion, inhalation, injection, or direct contact.
