| 释义 |
immediate allergy
Thesaurus| Noun | 1. |  immediate allergy - an allergic reaction that becomes apparent in a sensitized person only minutes after contactatopic allergy, atopy, type I allergic reactionallergic reaction, allergy - hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity |
immediate allergy
im·me·di·ate hy·per·sen·si·tiv·i·tyan exaggerated immune response mediated by mast cell-bound IgE antibodies occurring within minutes after exposing a sensitized individual to the approximate antigen; also called Type I hypersensitivity. Clinical symptoms result from the physiologic effects of preformed or newly generated mediators, including histamine, platelet activating factor, prostaglandins, leukotrienes, bradykinin, tachykinins, and others. The reaction may be localized to specific organ systems or be generalized, leading to anaphylaxis. Symptoms include pruritus, urticaria, angioedema, conjunctivitis, sneezing, rhinorrhea, bronchospasm, hypotension, arrhythmias, and shock. See: allergy. Synonym(s): immediate allergy, immediate hypersensitivity reactionim·me·di·ate al·ler·gy (i-mē'dē-ăt al'ĕr-jē) A type I allergic reaction; so called because in a sensitized subject the reaction becomes evident usually within minutes after contact with the allergen (antigen), reaches its peak within an hour or so, then rapidly recedes.
See also: immediate reaction, anaphylaxis
Compare: delayed allergyimmediate allergy
Synonyms for immediate allergynoun an allergic reaction that becomes apparent in a sensitized person only minutes after contactSynonyms- atopic allergy
- atopy
- type I allergic reaction
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