Allergen

(redirected from Allergens)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

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 ?
These strategies shall consist of a) a wide scale outreach campaign utilizing print, radio, television, social media and other internet-based public service announcements, advertisements, posters, and other materials; b) community forums; c) health information and risk factor assessment at public events; d) providing reliable information to policymakers; e) distribution of information through local health agencies, schools, employer wellness programs, physicians, hospitals, health maintenance organizations, community-based organizations, state fairs, and DOH and senior service offices; and f) identifying and obtaining educational materials that translates accurately the latest scientific information on food allergens in easy-to-understand terms.
The research reveals that cockroach, dust mite, and dog allergens and bacteria were present in the homes surveyed.
Dr said some people become oversensitive to allergens. 'Medically we refer to this as atopic or to have atopy, which means that such people produce more antibodies than others.
Identification and determination of molecular weight of allergenic bands by comparison with Allergen database: An allergen database (www.allergen.org) contains approved and officially recognized allergens.
In an attempt to refine a cost-effective allergy test panel, Bousquet et al looked at large numbers of skin allergy tests to identify which were highly positive and to determine the size of the panel that might be necessary to identify most of the positive allergens. (4) They tested approximately 3,000 patients and found that roughly two-thirds were sensitized to at least one allergen, and they identified eight allergens (grass pollen, Dermatophagoidespteronyssinus, birch pollen, cat dander, Artemisia, olive pollen, Blatella, and Alternaria) that allowed them to detect more than 95% of sensitized patients.
In this study, we found that mouse, cat, and dog allergens were commonly detected in the dust samples obtained from inner-city schools.
IgE-mediated allergic reactions to environmental allergens play a very significant role in the pathophysiology of asthma.
The technology was inspired by their experience with PurotexA(r), a successful allergen reduction solution that has been used in bedding for more than ten years.
As LG's exclusive technology for clothing hygiene and anti-allergen, Steam has also received certification from the British Allergy Foundation for removing 99.9 percent of allergens.
Due to different geographical environments, climates and dietary habits, there are large regional differences among the allergens that induce chronic urticaria.
Most of the disagreement revolves around the definition of what constitutes an allergic reaction and what test is used for the diagnosis of significant allergens.
From a skin perspective, parabens are "perhaps the safest" preservative, but despite that they have a bad public reputation Donald V Belsito, MD, said in his Allergen of the Year talk during the Society's annual meeting held the day before the annual meeting of the American Academy of Dermatology.