What is an allergen?

Many things. Anything that causes an allergic reaction, usually an ige mediated reaction. Spring pollen allergens are tree pollens and molds. Summer is mostly grass and mold. Fall is ragweed, other weeds, and mold. Year round allergens in the house are dust mites, pet danders, and , wait for it, mold. Common food allergens are peanut, shellfish, nuts, wheat, and others.
A foreign protein . An allergen is a foreign protein that the immune system over-reacts to and produces allergic antibody, also called ige, against.

Related Questions

What's sensitization to allergen?

Immune response. In sensitization the immune system has recognized an allergen as foreign to the body & developed an elaborate mechanism to rid itself of the substance on re-exposure. Sensitization involves processing of allergen by dendritic cells that recruit t lymphocytes to instruct b lymphocytes to make a specific class of antibody, ige class, against the allergen. Ige binds to mast cells. You're sensitized. Read more...

What's effectiveness of allergen immunotherapy?

IT effectiveness. There have been many studies showing the effectiveness of immunotherapy, measuring a reduction in symptoms and medication requirements. A number of studies have dealt with pollens (ragweed, grasses, trees) and generally show a response rate of over 90% of individuals helped after one year with nasal allergies. Studies also show benefits with animal and dust allergies and in asthma. Read more...
High if done correct. For stinging insect venom.Effectiveness approaches 99% . For environmental inhalant allergies when appropriately tested and results interpretted by an expert before choosing relevant allergens to include in desensitization effectiveness has been shown for most symptoms up to 85% . Read more...

When I'm on the allergy test, what is the allergen on top of dust mites?

Varies by allergist. Each allergist arranges their allergy skin test in their own way. There is no standard pattern for arranging allergy skin tests. It would be necessary to speak to the allergist who placed the skin test. Read more...

What are common food allergens?

Eight foods . Milk eggs peanuts tree nuts such as almonds, cashews, walnuts. Fish (such as bass, cod, flounder) shellfish (such as crab, lobster, shrimp) soy wheat the eight foods included in food allergy labeling account for an estimated 90 percent of allergic reactions. Read more...

What are common plant allergens?

Ragweed. Ragweed, mulberry, sage grasses are some of the more common plant allergens. Read more...
Pollens. Typically grass pollens such as bermuda grass pollen , rye grass pollen are common in my patients. Also i find tree pollens are another common trigger -- trees like cedar, ash, olive and elm. In the fall the typical plant allergens are weed pollens -- like russian thistle and ragweed. Hope this helps. Read more...

I'm curious as to what are allergens and what is allergy?

Overactive immunity. An allergy is an overactive immune response to allergens (typically proteins that are found in dust, mold, pollens, dander, foods, etc) that do not affect most people. The immune response is via ige (the allergic antibody) that triggers the release of chemical mediators (including histamine) when the allergen comes into contact with ige on mast cells in the nose, lung, GI tract etc. Read more...