« Previous Page
An antigen is a substance (such as part of a virus or bacteria)
that triggers the immune system to produce cells (antibodies) that attack and
try to destroy the antigen. The body usually produces one specific type of
antibody for each antigen.
Sometimes the body mistakenly recognizes its own tissue as an
antigen or foreign substance and produces antibodies against its own tissue.
This is called an autoimmune response or autoimmune
Current as of:
February 19, 2016
E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & W. David Colby IV, MSc, MD, FRCPC - Infectious Disease
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.