Allergy terms.Allergen: a substance that causes an allergic reaction; an antigen. Allergic rhinitis: seasonal or perennial nasal inflammation. Allergist al·ler·gist n. A physician specializing in the diagnosis and treatment of allergies. allergist Immunology A physician, who is often trained in both internal medicine and clinical immunology and who manages Pts with : a medical doctor trained in the diagnosis and treatment of allergies. Allergy: an abnormal reaction to ordinarily harmless substances called allergens. Antibody: a protein molecule produced to fight off, and protect the body from, foreign substances. Antigen: any substance that causes the body to produce anti-bodies. Antihistamine antihistamine (ăn'tĭhĭs`təmēn), any one of a group of compounds having various chemical structures and characterized by the ability to antagonize the effects of histamine. : a drug that inhibits the effects of histamine and stops or prevents allergic reactions. Dander dander /dan·der/ (dan´der) small scales from the hair or feathers of animals, which may be a cause of allergy in sensitive persons. dan·der n. : tiny particles from the skin, feathers, or hair of an animal that frequently cause allergies. Dust mites: microscopic creatures that live in house dust; their carcasses and excrement are potent allergens. Hay fever: seasonal rhinitis Rhinitis Definition Rhinitis is inflammation of the mucous lining of the nose. Description Rhinitis is a nonspecific term that covers infections, allergies, and other disorders whose common feature is the location of their symptoms. caused mainly by pollens. Histamine: a chemical substance that occurs naturally in the body; when released in allergic reactions, it causes symptoms. Immune system: the complex system of cells and chemicals that react against foreign substances entering the body. Immunotherapy: stimulation of the immune system for the purpose of treating allergies. Irritant: an agent that produces local inflammation. Mold: a superficial growth of fungus that produces tiny, lightweight airborne spores. Pollen: the microscopic spores of trees, grasses, and flowers, pollen forms a fine airborne dust and can cause allergic reactions. Rhinits: inflammation of the mucous membrane of the nose; a nasal condition accompanied by sneezing, congestion The condition of a network when there is not enough bandwidth to support the current traffic load. congestion - When the offered load of a data communication path exceeds the capacity. , and the discharge of watery fluid. Scratch test: a test in which a specific antigen is applied to a scratch on the skin; if the person being tested is sensitive to the antigen, a red, itchy wheal wheal (hwel) a localized area of edema on the body surface, often attended with severe itching and usually evanescent; it is the typical lesion of urticaria. wheal n. develops. Upper respiratory congestion: swelling of the nasal passages, increased secretion of mucus, and spasm, or constriction constriction /con·stric·tion/ (kon-strik´shun) 1. a narrowing or compression of a part; a stricture.constric´tive 2. a diminution in range of thinking or feeling, associated with diminished spontaneity. , of smooth muscle tissue. Wheal: a sudden elevation of the skin surface that is measured to determine the degree of allergic reactivity. |
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