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Anaphylactic shock

Pathology. a severe and sometimes fatal allergic reaction to a foreign substance, especially a protein, as serum or bee venom, to which an individual has become sensitized, often involving rapid swelling, acute respiratory distress, and collapse of circulation.
a severe, sometimes fatal, reaction to a substance to which a person has an extreme sensitivity, often involving respiratory difficulty and circulation failure

anaphylactic shock n.
A severe, sometimes fatal allergic reaction characterized by a sharp drop in blood pressure, urticaria, and breathing difficulties that is caused by exposure to a foreign substance, such as a drug or bee venom, after preliminary or sensitizing exposure. Also called anaphylaxis.
anaphylactic shock
A sudden, life-threatening allergic reaction, characterized by dilation of blood vessels with a sharp drop in blood pressure and bronchial spasm with shortness of breath. Anaphylactic shock is caused by exposure to a foreign substance, such as a drug or bee venom, to which the individual has been previously exposed. The substances act as antigens, provoking a preliminary immune response during the first exposure that results in a full-blown, immediate response during secondary exposure, called an immediate hypersensitivity reaction. Emergency treatment, including epinephrine injections, must be administered to prevent death. Also called anaphylaxis.


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  • Anaphylaxis

    exaggerated allergic reaction to a foreign protein resulting from previous exposure to it. Historical Examples What if gout should prove to be a sensitization or anaphylaxis to uric acid that does not exist in the non-gouty? The Treatment of Hay Fever George Frederick Laidlaw Foreign protein sensitization or anaphylaxis was the basis of Dr. Rutledge’s […]

  • Anaphylactogen

    anaphylactogen anaphylactogen an·a·phy·lac·to·gen (ān’ə-fə-lāk’tə-jən) n. A substance capable of producing anaphylaxis in an individual. an’a·phy·lac’to·gen’ic (-jěn’ĭk) adj.

  • Anaphylactoid

    anaphylactoid anaphylactoid an·a·phy·lac·toid (ān’ə-fə-lāk’toid’) adj. Of or resembling anaphylaxis.

  • Anaphylactogenesis

    anaphylactogenesis anaphylactogenesis an·a·phy·lac·to·gen·e·sis (ān’ə-fə-lāk’tə-jěn’ĭ-sĭs) n. The production of anaphylaxis.

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