Antigen - Definition

February 2017


Definition

Antigens are molecules recognized as foreign bodies that can be present during contamination by viral, fungal, or bacterial germs, a toxin, or a cancerous disease. Their presence in a cell creates a reaction from the body once they are recognized; the making of antibodies enables the body to fight and destroy these antigens. Antigens then provoke an immune reaction. The lymphocytes B and T, white blood cells, also recognize antigens. Antigens are also responsible for allergic reactions.

Related

Original article published by . Translated by Jeff. Latest update on October 28, 2016 at 06:33 AM by MarziaChiriatti.
This document, titled "Antigen - Definition," is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM Health (health.ccm.net).