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Antigen
Basic
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Overview
Definition
An antigen is any substance that causes your immune system to produce antibodies against it. An antigen may be a foreign substance from the environment such as chemicals, bacteria, viruses, or pollen. An antigen may also be formed within the body, as with bacterial toxins or tissue cells.
Information
Review Date: 2009-08-10
Reviewed By: 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.
Keywords: ,body, causes, tissue, system, cells, bacteria, immune, produce, against, bacterial, antibodies, chemicals, viruses, foreign, environment, toxins, formed, pollen, substance, antigen
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