Type: Term Pronunciation: al′er-jē Definitions: 1. Hypersensitivity caused by exposure to a particular antigen (allergen) resulting in a marked increase in reactivity to that antigen on subsequent exposure, sometimes resulting in harmful immunologic consequences. 2. That branch of medicine concerned with the study, diagnosis, and treatme
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An unusual sensitivity to a substance normally harmless to others. The host mounts an immunologic response against an allergen and reacts whenever exposed to it. Usually caused by a foreign antigen in food, pollen or chemicals.
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An unusually nasty reaction to something like food, dust etc
Example: Many people suffer from an allergy to grass pollen.
Found on http://www.bbc.co.uk/skillswise/glossary/
- hypersensitivity reaction to a particular allergen
Found on http://www.webdictionary.co.uk/definition.php?query=allergy
Special sensitivity to an allergen manifesting itself in asthma like symptoms, rashes, hay fever and eczema amongst other things.
Found on http://www.encyclo.co.uk/local/20474
An allergy is when a substance triggers an undesirable or over-reaction in the immune system.
Found on http://www.bcpa.co.uk/glossary.htm
a negative reaction to a substance that in most people causes no reaction
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Extreme sensitivity to a substance that causes the body to react to any contact with that substance.
Found on http://www.gadsbywicks.co.uk/uploaded/3822.pdf
Our Allergy Main Article provides a comprehensive look at the who, what, when and how of Allergy Allergy: A misguided reaction to foreign substances by the immune system, the body system of defense against foreign invaders, particularly pathogens (the agents of infection). The allergic reaction is misguided in that these foreign substances are usua
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In an animal, a hypersensitivity response to some antigen that has previously elicited an immune response in the individual, producing a large and immediate immune response. Allergies, for example to bee venom, are occasionally fatal in humans.
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1. <immunology> A state of hypersensitivity induced by exposure to a particular antigen (allergen) resulting in harmful immunologic reactions on subsequent exposures, the term is usually used to refer to hypersensitivity to an environmental antigen (atopic allergy or contact dermatitis) or to drug allergy. ... The original meaning, now obsole
Found on http://www.mondofacto.com/facts/dictionary?allergy
allergic reaction noun
hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity
Found on http://wordnetweb.princeton.edu/perl/webwn?s=allergy
(al´әr-je) a state of abnormal and individual hypersensitivity acquired through exposure to a particular substance called an allergen; reexposure reveals a heightened capacity to react. There are three major types of allergies: (1) delayed-reaction ones, caused by sensitized lymphocytes; (2) antigen-antibody react...
Found on http://www.encyclo.co.uk/local/21001
hypersensitivity reaction by the body to foreign substances (antigens) that in similar amounts and circumstances are harmless within the bodies of ... [22 related articles]
Found on http://www.britannica.com/eb/a-z/a/49
(Gr. allos other + ergon work) 1. a state of hypersensitivity induced by exposure to a particular antigen (allergen) resulting in harmful immunologic reactions on subsequent exposures; the term is usually used to refer to hypersensitivity to an environmental antigen (atopic allergy or contact dermatitis) or to drug allergy; the original meaning, no
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allergy 1. A misguided reaction to foreign substances by the immune system, the body system of defense against foreign invaders, particularly pathogens (the agents of infection). 2. Etymology: from about 1911, from German Allergie, coined in 1906 by Clemens E. von Pirquet (1874-1929), Austrian pediatrician, which came from Greek allos, 'other, dif
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A term covering immune reactions to non-pathogenic antigens, which lead to inflammation and deleterious effects in the host.
Found on http://www.microbiologybytes.com/iandi/ImmGloss.html
An allergy is a hypersensitivity disorder of the immune system. Allergic reactions occur when a person`s immune system reacts to normally harmless substances in the environment. A substance that causes a reaction is called an allergen. These reactions are acquired, predictable, and rapid. Allergy is one of four forms of hypersensitivity and is fo.
Found on http://en.wikipedia.org/wiki/Allergy
A state of abnormal sensitivity in susceptible individuals to one or more foreign materials, called allergens, not normally considered harmful. Allergy is essentially the inappropriate reaction of antibody and antigen defenses to environmental substances. Common allergens include pollen, animal hair...
Found on http://www.daviddarling.info/encyclopedia/A/allergy.html
allergy, hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons. Allergens, or allergy-causing substances, can be airborne substances (e.g., pollens, dust, smoke), infectious agents (bacteria...
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An allergy is a hypersensitivity of body tissue to a substance.
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Special sensitivity of the body that makes it react with an exaggerated response of the natural immune defence mechanism to the introduction of an otherwise harmless foreign substance (allergen)
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0000096.html
An abnormally high sensitivity to certain substances, such as pollens, foods, or microorganisms. Common indications of allergy may include sneezing, itching, and skin rashes.
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A hypersensitive state of the immune response, wherein exposure to a particular substance (an allergen) results in a noxious and sometimes physically harmful immunologic response.
Found on http://www.thehorse.com/Glossary.xhtml?L=A
An 'over- reaction' to a normally harmless substance by the body. Individual animals may develop an allergy to a single 'allergen' or several different allergens. A variety of things are known to cause allergic signs in cats including foods, pollens or the saliva of a flea bite. Affected cats may develop skin problems, or experience digestive upset
Found on http://www.cats.org.uk/cat-glossary/
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