Allergen

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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.

al·ler·gen

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

allergen

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

al′ler·gen′ic (-jĕn′ĭk) adj.

allergen

Any biomolecular substance (antigen) capable of evoking an allergic reaction, specifically a type-1 hypersensitivity reaction through immunoglobulin E-mediated reaction.

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.

al·ler·gen

(al'ĕr-jĕn)
An incitant of altered reactivity (allergy), an antigenic substance.
[allergy + G. -gen, producing]

allergen

Any ANTIGEN causing ALLERGY or causing an allergic reaction in a sensitive person.

allergen

an antigen that produces an allergic response.

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.

al·ler·gen

(al'ĕr-jĕn)
Antigen that induces an allergic or hypersensitive response.
[allergy + G. -gen, producing]

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
References in periodicals archive ?
Machine washable with non-allergenic, polyester, hollowfibre filling for comfort.
However, the limitation of the protein assay method is that it cannot differentiate between allergenic and non-allergenic proteins, (5) whereas the allergen content provides better insight into the concentrations of NRL allergenic proteins.
This volume also includes a Q&A section, appendices for non-allergenic foods and a list of online resources for further research.
Packed with great tips and enjoyable to read, with it the whole family can share good, wholesome food that is easy to cook and non-allergenic.
The products are formulated to be biodegradable and non-allergenic, and are packaged in recyclable bottles.
Here's just some of the good news about wool carpet's ability to create a healthy home with benefits that last as long as the carpet itself: Wool carpet is nontoxic, non-allergenic and will not support bacterial growth, continually purifying indoor air for up to thirty years while locking the contaminants deep in the core of the fiber.
Their research is the first to show that allergenic pollen releases much greater amounts of NO and nitrite than non-allergenic pollen.
Source materials are usually defatted with acetone or ether to remove non-allergenic lipids, fats and oils that complicate extraction and filtration procedures.
Apply the non-allergenic, non-toxic petta-paint to the stamp then lightly press onto your pet's skin.
A little pricier than others (but worth every penny we reckon) you'll love the luxury of non-allergenic bedding that's perfectly natural, warming in winter and cooling in summer.
They're made with organic wheat, spelt (a non-allergenic form of wheat), and oats.
CDT said the testing techniques revealed that most of the platinum emission was in a form consistent with it being platinum metal and oxide, which are generally regarded as non-allergenic, while the remainder -- less than one percent of the platinum emitted -- could be water dissolvable with some anionic character, as determined by ion exchange separations, which is the portion where any potential allergenic forms would be found.

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