First Time User? Sign Up Now
First Time User? Enroll now.
Home > Health Library > Antibodies
Antibodies are proteins made by the body's natural defense system (immune system) to fight foreign substances, such as bacteria. Antibodies attach themselves to the foreign substance, allowing other immune system cells to attack and destroy the substance.
The surfaces of viruses, fungi, and bacteria contain markers called antigens. To destroy the viruses, fungi, or bacteria, the immune system creates antibodies that are specific for each antigen.
Blood tests can detect antibodies to certain bacteria, fungi, and viruses, such as the viruses that cause chickenpox, HIV infection, hepatitis, and mononucleosis. Some conditions can be diagnosed by detecting antibodies in a person's blood to the virus, fungus, or bacteria that is causing the condition.
Sometimes the body responds to its own tissue as though the tissue was a foreign substance, creating antibodies against the tissue and triggering reactions that cause normal cells to be destroyed. This is called an autoimmune response or autoimmune disease.
Current as of:
June 25, 2018
Medical Review:E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & Martin J. Gabica, MD - Family Medicine
To learn more about Healthwise, visit Healthwise.org.
© 1995-2018 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
1430 N Salem Street
Apex, NC 27502
2615 Lake Drive
Raleigh, NC 27607
901 Ridgefield Drive
Raleigh, NC 27609
4420 Lake Boone Trail
Raleigh, NC 27607
357 Carolina Arbors Drive
Durham, NC 27703
UNC REX Healthcare 4420 Lake Boone Trail Raleigh, NC 27607, USA 919-784-3100
Chosen for Excellence
Co-Worker & Physician Login
Rex Connects Blog
Copyright 2019 UNC Health Care. All rights reserved.