Allergen


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Related to Allergen: Allergen immunotherapy

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 ?
Test results show a significant reduction of 92.8% on the amount of cat hair allergen Fel d1 found in treated samples.
Allergen detection results: Ninety-two children showed positive results by allergen detection, with the positive rate of 95.83% (92/96).
Because the mast cells populate the dermis usually close to the blood vessels, (26) it is only logical to assume that the diagnostic power of a test that deposits the allergen literally in the vicinity of the mast cells (ID test) will have better diagnostic power than a test that deposits the allergen in the surface of the skin (SPT), where mast cells are likely to be absent.
Belsito also highlighted why propylene glycol received the nod as 2018's Allergen of the Year (Dermatitis.
They found that the presence of pets and pests has a major influence on high levels of indoor allergens. Housing characteristics also mattered--elevated exposure to multiple allergens is more likely in mobile, older, rental, and rural homes.
Sensitization to an allergen component (d1) of the house dust mite Dermatophagoides pteronyssinus was detected in 15 patients with PAR.
According to the FDA, eight allergens account for 90 percent of all food-related allergic reactions: milk, eggs, peanuts, tree nuts, soy, wheat, fish and shellfish.
Fink, "Characterization of a major latex allergen associated with hypersensitivity in spina bifida patients, "J Immunol.
Nature's One learned of the possible milk allergen during a routine document review of its vendor, which indicated that milk or a milk derivative was added to the beverage's natural flavor.
Specialist said in general those susceptible should avoid triggers, and those with an existing allergies should avoid contact with any allergen.
Wheat (Triticum aestivum) is a significant allergen source responsible for various clinical manifestations of allergy such as food allergy, pollen allergy, respiratory allergy (Pahr et al., 2012).
Dynamic Conveyor Corp., manufacturer of easy-to-clean conveyor systems for the food processing, pharmaceutical and packaging industries, now offers an Allergen Kit to accompany its DynaClean[R] sanitary conveyors.