anaphylaxis

(redirected from Anaphylactoid reactions)
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an·a·phy·lax·is

 (ăn′ə-fə-lăk′sĭs)
n.
A sudden, usually systemic allergic reaction, characterized by vasodilation resulting in decreased blood pressure, smooth muscle contraction resulting in shortness of breath, and hives, caused by hypersensitivity induced by a secondary exposure to a foreign substance, such as a drug or protein, after an initial sensitizing exposure.


an′a·phy·lac′tic (-lăk′tĭk), an′a·phy·lac′toid (-toid) adj.
an′a·phy·lac′ti·cal·ly adv.

anaphylaxis

(ˌænəfɪˈlæksɪs) or

anaphylaxy

n
(Medicine) extreme sensitivity to an injected antigen, esp a protein, following a previous injection
[C20: from ana- + (pro)phylaxis]
ˌanaphyˈlactic, ˌanaphyˈlactoid adj
ˌanaphyˈlactically adv

an•a•phy•lax•is

(ˌæn ə fəˈlæk sɪs)

n.
a hypersensitive reaction to an allergen, as a severe bout of hay fever, the rapid appearance of wheals, or profound physiological changes and shock.
[1905–10; ana- + (pro) phylaxis]

anaphylaxis

extreme sensitivity to an antigen, causing secretion of histamine and attendant adverse reactions, sometimes fatal. — anaphylactic, adj.
See also: Disease and Illness
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.anaphylaxis - hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance
drug - a substance that is used as a medicine or narcotic
anaphylactic shock - a severe and rapid and sometimes fatal hypersensitivity reaction to a substance (especially a vaccine or penicillin or shellfish or insect venom) to which the organism has become sensitized by previous exposure
hypersensitivity reaction - an inappropriate and excessive reaction to an allergen (as pollen or dust or animal hair or certain foods); severity ranges from mild allergy to severe systemic reactions leading to anaphylactic shock
Translations

an·a·phy·lax·is

n. anafilaxis, hipersensibilidad, reacción alérgica extrema.

anaphylaxis

n anafilaxia, anafilaxis f
References in periodicals archive ?
Anaphylactic reactions may not be clinically distinguished from anaphylactoid reactions.
EPP is a poorly characterised and an ultra-rare metabolic disorder which causes severe phototoxic and anaphylactoid reactions in patients.
Although the hemodynamic changes occurring during anaphylaxis and anaphylactoid reactions may vary, the major factors causing cardiovascular abnormalities are universal and result from an initial loss of intravascular fluid and vasodilation, which may be followed shortly by vasoconstriction and then myocardial depression.
Symptoms such as urticaria and anaphylactoid reactions do not stem from true allergic reactions as one would expect after ingesting food or other immune-system-provoking substance.
Anaphylactic or anaphylactoid reactions may also be secondary to complement activation with liberation of anaphylatoxins.
All iron replacement products have potential life-threatening anaphylactoid reactions (e.
Two patients on resli zumab had anaphylactoid reactions, neither requiring epinephrine.
Anaphylactoid reactions may occur in the absence of IgE, but with similar clinical outcomes.
Causes of anaphylactoid reactions in cattle after administration of lipoid preparations.
The largest experience in the published CKD literature is with this formulation, and has shown the best safety profile in terms of severe and/or anaphylactoid reactions with rates less than 0.
Anaphylactoid reactions are clinically similar, but are not IgE mediated.