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	Feature Article Illustrations for this article Click on an image below to enlarge Positive reaction to allergen Allergen Definition An allergen is a substance that can cause an allergic reaction. Allergens are substances that, in some people, the immune system recognizes as "foreign" or "dangerous" but cause no response for most people. Information Common allergens include: Bacteria, viruses, and animal parasites Chemicals Dust Drugs (such as antibiotics, serums) Foods (such as milk, chocolate, strawberries, wheat) Perfumes Plants Pollen Smoke See also: Allergies Allergic reaction Food allergy Allergy to drugs Antigen Antibody Continue reading this article

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Allergic rhinitis (4 Videos, 3 Images) Average Rating: (Doctor-Reviewed information)
Allergic rhinitis is a collection of symptoms, predominantly in the nose and eyes, caused by airborne particles of dust, dander, or plant pollens in people who are allergic to these substances. When these symptoms are caused by pollen, the allergic rhinitis is commonly called hay fever. See also: Allergies; Allergy to mold, dander, dust; Asthma. Reviewer: Donald Accetta, MD, MPH, President, Allergy & Asthma Care, PC, Taunton, MA. Review provided by VeriMed Healthcare Network.Date: 10/30/2006
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Allergy to mold - dander - dust (2 Videos, 4 Images) (Doctor-Reviewed information)
Allergy-related symptoms can occur after you are around mold, certain animals or animal hair, dust, and other substances. These substances are usually found indoors and do not cause symptoms for most people. See also: Asthma; Allergic rhinitis. Reviewer: Donald Accetta, MD, MPH, President, Allergy & Asthma Care, PC, Taunton, MA. Review provided by VeriMed Healthcare Network.Date: 10/30/2006
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