Allergen

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Related to pollen allergen: pollen count, Pollen allergy

allergen

 [al´er-jen]
1. a substance, protein or nonprotein, capable of inducing allergy or specific hypersensitivity.
2. a purified protein of a food (such as milk, eggs, or wheat), bacterium, or pollen. adj., adj allergen´ic. Allergens are used to test a patient for hypersensitivity to specific substances (see skin test). They are also used to desensitize or hyposensitize allergic individuals (see immunotherapy).

Almost any substance in the environment can be an allergen. The list of known allergens includes plant pollens, spores of mold, animal dander, house dust, foods, feathers, dyes, soaps, detergents, cosmetics, plastics, and drugs. Allergens can enter the body by being inhaled, swallowed, touched, or injected. Once the allergen comes in contact with body cells it sets off a series of immune responses that can range from localized inflammation to a fatal systemic anaphylaxis.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

al·ler·gen

(al'er-jen),
An antigen that induces an allergic or hypersensitive response.
[allergy + G. -gen, producing]
Farlex Partner Medical Dictionary © Farlex 2012

allergen

(ăl′ər-jən)
n.
A substance, such as pollen, that causes an allergy.

al′ler·gen′ic (-jĕn′ĭk) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

allergen

Any biomolecular substance (antigen) capable of evoking an allergic reaction, specifically a type-1 hypersensitivity reaction through immunoglobulin E-mediated reaction.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

allergen

Immunology A substance–eg, pollen, dander, mold, which can evoke an immediate-type hypersensitivity–allergic reaction, triggering a release of histamine. See Airborne allergen, Cockroach allergen, Feline allergen, Immunogenic allergen.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

al·ler·gen

(al'ĕr-jĕn)
An incitant of altered reactivity (allergy), an antigenic substance.
[allergy + G. -gen, producing]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

allergen

Any ANTIGEN causing ALLERGY or causing an allergic reaction in a sensitive person.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

allergen

an antigen that produces an allergic response.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Allergen

A foreign substance, such as mites in house dust or animal dander which, when inhaled, causes the airways to narrow and produces symptoms of asthma.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

al·ler·gen

(al'ĕr-jĕn)
Antigen that induces an allergic or hypersensitive response.
[allergy + G. -gen, producing]
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about Allergen

Q. How do I diagnose an allergy? I think I’m allergic to something. I’ve been having running nose, sneezing, and even problems breathing every once in a while. How can I find the cause?

A. There can be thousands of materials that you are allergic to. But usually people are allergic to the same things (cats, pets in general, type of foods and so forth..). what you can do is an allergy test- It’ll cover most of the usual things. Here is a video that explains it:
http://www.5min.com/Video/Allergy-Testing-9036

Q. Can it be that I stopped being allergic to cats? is it a miracle? I was allergic to cats in my childhood, and yesterday a friend cat jumped on me and nothing happened.

A. NO,IF NOTHING HAPPENED

More discussions about Allergen
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References in periodicals archive ?
Jilek et al., "Dissection of immunoglobulin E and T lymphocyte reactivity of isoforms of the major birch pollen allergen Bet v 1: potential use of hypoallergenic isoforms for immunotherapy," Journal of Experimental Medicine, vol.
Frequency of HLA-DRB1*12 was also variable with the highest frequency found in Punjab that might be due to tropical forests in Punjab and high prevalence of pollen allergens (Ahmad et al., 2011).
With seasonal allergic rhinitis, an inflammatory response is limited in time, as a rule, by a contact season with pollen allergens and is short term.
A SLIT combination of Timothy pollen and nine additional pollen allergen extracts performed significantly worse than Timothy alone at the same dose; in fact, it failed to outdistance placebo in most endpoints (J.
Norman, "Induction of IgE-mediated immediate hypersensitivity to group I rye grass pollen allergen and allergoids in non-allergic man," Immunology, vol.
For convenience, the 62 allergenic sources were divided into four general groups, that is, contact allergens, food allergens, pollen allergens, and microbial allergens.
The role of major olive pollen allergen Ole e 1, Ole e 9, and Ole e 10 on mice sensitization.
Allergic attacks occur when the immune system mistakes cat or pollen allergens for germs.
To avoid pollen allergens, one must know when the pollen counts are highest.
They resemble parts of other proteins, such as snake venom toxins and ragweed pollen allergens, that bind to specific receptors.
Among pollen Allergens, commonest Allergens in decreasing order were holoptelea (52.34%), prosposis (52.34%) and parthenium (47.65%).
Eczema is a persistent skin rash that can be fairly common in infants or youth, which some research indicates may be linked to food or pollen allergens. Most people outgrow it as they reach adulthood, but some suffer from the debilitating condition their entire life.