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What is Antigen in Microbiology? PDF | Download eBooks

Learn Antigen definition in microbiology with explanation to study “What is Antigen”. Study antigen explanation with microbiology terms to review microbiology course for online degree programs.

Antigen Definitions

  1. A substance (such as a protein, nucleoprotein, polysaccharide, or sometimes a glycolipid) to which lymphocytes respond.

    Prescott's Microbiology 9th Edition by Joanne Willey, Linda Sherwood, Christopher J. Woolverton



  2. Any cell, particle, or chemical that induces a specific immune response by B cells or T cells and can stimulate resistance to an infection or a toxin.

    Foundations in Microbiology by Kathleen Park Talaro, Arthur Talaro



Antigen Explanation

Antigen is any substance that is considered foreign by the body's immune system and thus it stimulates an immune response by activating the lymphocytes, which are a type of white blood cells involved in fighting the body's infections. Some antigens are autoantigens or self-antigens are constituents of body and antibodies start to attack these antigens in an autoimmune disease.

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