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protein produced by B cell lymphocytesn to destroy antigens
substance that the body recognizes as foreign; evokes an immune response. Most antigens are proteins or protein fragments found on the surface of bacteria, viruses, or organ transplant tissue cells.
body's ability to resist foreign organisms and toxins. This includes natural immunity and acquired immunity.
antibodies (gamma globulins) such as IgA, IgE, IgG, IgM and IgD that are secreted by plasma cells in response to the presence of an antigen.
the ability of T lymphocytes to recognize and accept the body's own antigens as "self" or friendly. Once tolerance is established, the immune system will not react against the body.
weakened or killed micoorganisms, toxins, or other proteins given to induce immunity to infection or disease.
group of clinical signs and symptoms associated with suppression of the immune system and marked by opportunistic infection, secondary neoplasms, and neurologic problems.
abnormal hypersensitivity acquired by exposure to an antigen
malignant tumor of bone marrow cells
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