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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 as being foreign to the body and produces antibodies that target the antigens.
Hemolytic disease of the newborn
Acute cytomegalovirus (CMV) infection
Ataxia - telangiectasia
Colorado tick fever
Idiopathic aplastic anemia
Ebola hemorrhagic fever
Selective deficiency of IgA
Chronic lymphocytic leukemia (CLL)
Systemic lupus erythematosus
Drug-induced lupus erythematosus
Dengue hemorrhagic fever
Chronic granulomatous disease
Chlamydia infections in women
Chronic myelogenous leukemia (CML)
Drug-induced immune hemolytic anemia
Immune hemolytic anemia
Rocky Mountain spotted fever
Secondary systemic amyloidosis
Cat scratch disease
Macroglobulinemia of Waldenstrom
CMV - pneumonia
Review Date: 7/3/2011
Reviewed By: Harvey Simon, MD, Editor-in-Chief, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital.
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