| ECFA, ECF-A | eosinophilic chemotactic factor of anaphylaxis |
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| PAF-A | platelet-activating factor of anaphylaxis |
| PCA | para-chloramphetamine; parietal cell antibody; passive cutaneous anaphylaxis; patient care assistant... |
| RPA | radial photon apsorptiometry; replication protein A; resultant physiologic acceleration; reverse pas... |
| SRF-A | slow-reacting factor-anaphylaxis |
| reversed passive anaphylaxis | An anaphylactic reaction induced in an animal injected with a specific antigen, which will bind to reactive tissue, and then, after a latent period, with serum from another animal previously sensitised to the identical antigen. Synonym: reversed anaphylaxis. (05 Mar 2000) |
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| pharmacologic mediators of anaphylaxis | Substances released from mast (and other) cells by the reaction of antigen and specific homocytotropic antibody on their surfaces; they include histamine, slow-reacting substance of anaphylaxis (SRS-A), bradykinin, and (in some species of animals) serotonin. (05 Mar 2000) |
| chronic anaphylaxis | A haemorrhagic and necrotizing inflammation developing in the ileum (and also the colon) of sensitised dogs when they are fed a second dose of the sensitizing material. Synonym: chronic anaphylaxis. (05 Mar 2000) |
| slow-reacting factor of anaphylaxis | Slow-reacting substance of anaphylaxis (SRS-A), a leukotriene of low molecular weight which is released in anaphylactic shock and produces slower and more prolonged contraction of muscle than does histamine; it is active in the presence of antihistamines (but not epinephrine) and seems not to occur preformed in mast cells, but as a result of an antigen-antibody reaction on the granules. Compare: peptidyl leukotrienes. Synonym: slow-reacting factor of anaphylaxis. (05 Mar 2000) |
| slow reacting substance of anaphylaxis | <immunology> Potent bronchoconstrictor and inflammatory agent released by mast cells, an important mediator of allergic bronchial asthma. A mixture of three leukotrienes (LTC4 mainly, LTD4 and LTE4) (18 Nov 1997) |
| systemic anaphylaxis | The immediate response, involving smooth muscles and capillaries throughout the body of a sensitised individual, that follows intravenous (and occasionally intracutaneous) injection of antigen (allergen). See: anaphylactic shock. Synonym: systemic anaphylaxis. (05 Mar 2000) |
| eosinophil chemotactic factor of anaphylaxis | A peptide (MW 500 to 600) that is chemotactic for eosinophilic leukocytes and is released from disrupted mast cells. (05 Mar 2000) |
| local anaphylaxis | The immediate, transient kind of response that follows the injection of antigen (allergen) into the skin of a sensitised individual and is limited to the area surrounding the site of inoculation. See: skin test. (05 Mar 2000) |