Category: Ia-In

A class of immunoglobulins found in all body fluids. They are the smallest but most common antibodies (75 percent to 80 percent) in the body. Abbreviated IgG. IgG antibodies are very important in fighting bacterial and viral infections. IgG antibodies are the only type of antibody that can cross the placenta in a pregnant woman…

A major class of immunoglobulins (antibodies) 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. About 10 percent to 15 percent of the antibodies present in the body are IgA antibodies.

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 classes of immunoglobulins are termed immunoglobulin A (IgA), immunoglobulin G (IgG), immunoglobulin M (IgM), immunoglobulin D (IgD) and immunoglobulin E (IgE).

Having an immune system that has been impaired by disease or medical treatment.

Able to develop an immune response. An immunocompetent body is able to recognize antigens and act against them. Immuno-competent is the opposite of immunodeficient.

Vaccination. Immunizations work by stimulating the immune system, the natural disease-fighting system of the body. The healthy immune system is able to recognize invading bacteria and viruses and produce substances (antibodies) to destroy or disable them. Immunizations prepare the immune system to ward off a disease. To immunize against viral diseases, the virus used in the vaccine has…

A blood disorder characterized by the destruction of blood platelets due to the presence of antiplatelet autoantibodies. (Autoantibodies are antibodies directed against the patient’s own cells, in this disorder, the patient’s own platelets.) Thrombocytopenia refers to a decrease in platelets (also known as thrombocytes). Purpura pertains to the visible hallmarks: purplish areas in the skin and mucous membranes (such as the…

A complex system that is responsible for distinguishing a person from everything foreign to him or her and for protecting his or her body against infections and foreign substances.

Any reaction by the immune system. For example, poison ivy can cause an immune response in the skin characterized by inflammation with tiny blisters, and itching. Also, a flu shot is designed to produce an immune response by stimulating the production of antibodies against the flu virus.

Protected against infection, usually by the presence of antibodies.