Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «I»:
Immunodeficient: Lacking immunity and so susceptible to
Immunodepressant: An agent that can depress or prevent the immune response. See: Immunosuppressant....
Immunodepression: See immunosuppression....
Immunogenetics: The genetics (inheritance) of the immune
response. For example, the study of the Rh, ABO and other blood groups or the HLA system
important to kidney and other transplants. ...
Immunoglobulin: A protein produced by plasma cells and lymphocytes and characteristic of these types of cells. Immunoglobulins play an essential role in the body's immune system. They attach to foreign substances, such as bacteria, and assist in destroying them. Immunoglobulin is abbreviated Ig. The...
Immunoglobulin A: A major class of immunoglobulins found in serum and external body secretions such as saliva, tears, and sweat as well as in the gastrointestinal, respiratory, and genitourinary tracts. Abbreviated IgA....
Immunoglobulin D: Abbreviated IgD. A class of immunoglobulins found as antibodies on the surface of B cells (B lymphocytes). Almost nothing is known about the normal function of IgD....
Immunoglobulin E: Abbreviated IgE. A class of immunoglobulins that includes the antibodies elicited by an allergic substance (allergen). A person who has an allergy usually has elevated blood levels of IgE. IgE antibodies attack and engage the invading army of allergens....
Immunoglobulin G: Abbreviated IgG. A major class of immunoglobulins found in the blood, including many of the most common antibodies circulating in the blood. Also known as gamma globulin....
Immunoglobulin M: Abbreviated IgM. A major
class of immunoglobulins. IgM includes the antibodies that are usually produced first in an immune response and are later replaced by other types of antibodies....
Immunologist: A person who is knowledgeable about immunology. ...
Immunology: The study of all aspects of the immune system
including its structure and function, disorders of the immune system, blood banking,
immunization and organ transplantation. ...
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Immunosuppressant: An agent that can suppress or prevent the immune response. Immunosuppressants are used to prevent rejection of a transplanted organ and to treat autoimmune diseases such as psoriasis, rheumatoid arthritis, and Crohn's disease. Some treatments for cancer act as immunosuppressants. ...
Immunosuppression: Suppression of the immune system. Immunosuppression may result from certain diseases such as AIDS or lymphoma or from certain drugs such as some of those used to treat cancer. Immunosuppression may also be deliberately induced with drugs, as in preparation for bone marrow or othe...