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Antibody

 

An antibody is a protein produced by the body's immune system when it detects harmful substances, called antigens. Examples of antigens include microorganisms (bacteria, fungi, parasites, and viruses) and chemicals.

Antibodies may be produced when the immune system mistakenly considers healthy tissue a harmful substance. This is called an autoimmune disorder.

Each type of antibody is unique and defends the body against one specific type of antigen.

 

References

Abbas AK, Litchman AH, Pillai S. Antibodies and antigens. In: Abbas AK, Litchman AH, Pillai S, eds. Cellular and Molecular Immunology. 8th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 5.

Male D, Brostoff J, Roth DB, Roitt IM. Antibodies. In: Male D, Brostoff J, Roth DB, Roitt IM, eds. Immunology. 8th ed. Philadelphia, PA: Elsevier Saunders; 2013:chap 3.

 
  • Antibodies

    Antibodies - illustration

    Antigens are large molecules (usually proteins) on the surface of cells, viruses, fungi, bacteria, and some non-living substances such as toxins, chemicals, drugs, and foreign particles. The immune system recognizes antigens and produces antibodies that destroy substances containing antigens.

    Antibodies

    illustration

    • Antibodies

      Antibodies - illustration

      Antigens are large molecules (usually proteins) on the surface of cells, viruses, fungi, bacteria, and some non-living substances such as toxins, chemicals, drugs, and foreign particles. The immune system recognizes antigens and produces antibodies that destroy substances containing antigens.

      Antibodies

      illustration

    A Closer Look

     

      Self Care

       

        Tests for Antibody

         

         

        Review Date: 9/3/2016

        Reviewed By: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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