Allergen Health Article

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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 or medications you put on your skin)
Foods (such as milk, chocolate, strawberries, wheat)
Perfumes
Plants
Pollen
Smoke

See also:

Reviewer Info: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. ; ADAM Health Illustrated Encyclopedia, 02/19/2009

Table of Contents

Definition Information

Related Learning
Centers

·As a Disease/Condition

Pollen

·As a Cause

Allergic Conjunctivitis

·As a Risk Factor

Giant Hives

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