Allergic reaction. In severe cases, this can include potentially deadly anaphylactic shock.

Life threatening type 1 hypersensitivity allergic reaction (see allergy) occurring in a person or animal exposed to an antigen or hapten to which they have previously been sensitized. Note: Consequenc [..]

Term used to refer to an animal's response to a certain substance, usually foreign; may include swelling, airway blockage, etc; may also be referred to as anaphylactic shock.

Severe allergic reaction that can cause intensely itchy welts (hives) on the skin, low blood pressure, and difficulty breathing. Anaphylaxis can be life-threatening so those who have been affected by it may be advised to carry an emergency injection of epinephrine.

the immediate immunologic (allergic) reaction initiated by the combination ofantigen (allergen) with mast cell cytophilic antobody (chiefly IgE). anaphylactic (adj) - as in anaphylactic shock - life t [..]

see anaphylactic.

A violent hypersensitivity reaction, resulting in shock.

(an´´ua-fu1-lak´sis) An unusually severe allergic reaction that can result in cardiovascular shock and death. anastomosis

A systemic (whole body) immediate hypersensitivity reaction. anapolysis

noun. an over-sensitivity to the delivery of an allergen to the body due to prior exposure to the same allergen. The outcome might be centralized or could spread to other areas and spans from welts on [..]

Severe allergic response to a substance. Symptoms include wheezing, itching, nasal congestion, hives, immediate intense burning of hands and feet, collapse with severe drop in blood pressure, loss of [..]

This is an extreme form of allergic reaction to an allergen in a sensitized person. The reaction can cause constriction of airway passages, extensive swelling of tissues in the throat area, and cardio [..]

A type of allergic reaction whereby the immune system responds to environmental substances aggressively. Within minutes of exposure to the allergen, there can be rapid airway constriction, a skin reaction and heart rhythms become altered. In very severe cases, it can lead to complete obstruction of the airways and death.

(n) hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance

The most severe form of allergy, in which the person's heart and lungs are unable to keep working, and death occurs unless prompt medical attention is obtained.

A severe allergic reaction, causing symptoms spanning from itching and swelling to trouble breathing, convulsions, shock, and coma.

Extreme immune system response to an allergen that is rapid in onset and can potentially be fatal.

Anaphylaxis is a severe, and sometimes fatal, allergic reaction characterised by low blood pressure (hypotension), localised swelling of the skin and mucous membranes (angio-oedema), narrowing of the [..]

Severe, life-threatening allergic response that may be characterised by symptoms such as lowered blood pressure, difficulty breathing, vomiting or diarrhea, and swelling and hives.

a rapidly developing and severe systemic allergic reaction. Symptoms may include swelling of the tongue, throat, and trachea, which can result in difficulty breathing, shock and loss of consciousness. [..]

An acute Hypersensitivity reaction due to exposure to a previously encountered Antigen. The reaction may include rapidly progressing Urticaria, respiratory distress, vascular collapse, systemic Shock, [..]

An evanescent cutaneous reaction occurring when antibody is injected into a local area on the Skin and Antigen is subsequently injected intravenously along with a dye. The dye makes the rapidly occurr [..]

An acute hypersensitivity reaction due to exposure to a previously encountered ANTIGEN. The reaction may include rapidly progressing URTICARIA, respiratory distress, vascular collapse, systemic SHOCK, [..]

An extremely severe allergic reaction that can be fatal; it occurs after repeated exposure to an antigen.

An acute, multi-system, allergic reaction (IgE mediated) to a substance, such as vaccination, drugs, and food. Symptoms of anaphylaxis may include breathing difficulties, loss of consciousness, and a [..]

A sudden and severe allergic reaction, which results in a serious fall in blood pressure, and may cause unconsciousness and death if not treated immediately.

An immediate and severe allergic response; a shock reaction to a substance. This can result in sudden severe breathing difficulty, severe drop in blood pressure, and/or loss of consciousness. Anaphylactic shock can kill if not treated promptly. Common causes of anaphylaxis include: bee stings in people that are allergic to bees, ingestion of certai [..]

An immediate and severe allergic response; a shock reaction to a substance. This can result in sudden severe breathing difficulty, severe drop in blood pressure, and/or loss of consciousness. Anaphyla [..]

Also known as anaphylactic shock, this is the most acute reaction to an allergen, resulting from a widespread release of histamine and other biologically active substances which in turn cause breathin [..]

An immediate and severe allergic reaction to a substance (e.g. food or drugs). Symptoms of anaphylaxis include breathing difficulties, loss of consciousness and a drop in blood pressure. This conditio [..]

a severe and sometimes fatal allergic reaction that can cause hives, itching, respiratory difficulty, and shock

An immediate and severe allergic reaction to a substance (e.g. food or drugs). Symptoms of anaphylaxis include breathing difficulties, loss of consciousness and a drop in blood pressure. This conditio [..]

A severe allergic reaction to an antigen (e.g. a sting or a bite)

 

Allergic reaction to certain food types.

A sudden, severe reaction to a substance, like a protein or drug. It can be life-threatening.

Anaphylaxis, or anaphylactic shock, is a severe, frightening and life-threatening allergic reaction. The reaction, although rare, can occur after an insect sting or as a reaction to an injected drug - for example, penicillin or antitetanus (horse) serum. Less commonly, the reaction occurs after a particular food or drug has been taken by mouth.

Extreme immune sensitivity produced upon the reintroduction of an antigen.

<immunology> An inflammatory reactions produced by an antigen combining with IgE bound to a mast cell that produces degranulation of the mast cell and subsequent release of histamine and histamine like substances. This can produce a localised or global immune reponse that results in an acute allergic reaction with shortness of breath, rash, w [..]

This is an acute, emergency immune reaction that occurs in some patients with allergies. It results in the release of toxins by the immune system that cause the person to pass out, stop breathing, dev [..]

An acute IgE-mediated allergic response that can be life-threatening.

A severe, sometimes fatal allergic reaction involving breathing problems. The allergic reaction can be due to a substance, a drug, vaccine, food, venom, or chemical.

An unusually severe allergic reaction, usually to food, drug, or insect bite. It occurs between an allergic antigen, and IgE bound to mast cells, stimulating the sudden release of immunological mediators locally and throughout the body. Initial symptoms appear within minutes, but recurrence may follow hours later. Hypersensitivity must have been in [..]