The clumping together of red blood cells or bacteria; a type of antigen-antibody reaction in which a solid antigen clumps together with a soluble antibody. This physiological property is useful in laboratory testing.

One of a group of simple proteins made by the liver. Serum albumin is the main protein found in the blood (about 60 percent of the total). It is responsible for much of the plasma colloidal osmotic pressure and serves as a transport protein. Human albumin USP is administered intravenously to restore blood volume following shock, trauma, surgery, an [..]

The viral cause of severe acute respiratory distress syndrome (SARS), a respiratory illness that first emerged in 2002. It is characterized by high fever, cough, and difficulty breathing, and is highly contagious and lethal in some cases. The majority of reported cases have originated in China.

An acquired defect or cellular immunity associated with infection by the human immunodeficiency virus (HIV). AIDS increases susceptibility to opportunistic infections. The CDC lists numerous infections and cancers that, in the presence of HIV infection, constitute an AIDS diagnosis.

Describing a medical condition which is marked by rapid onset, severe symptoms, and short course.

A rare autosomal dominant metabolic disorder characterized by a deficiency of the enzyme porphyobilinogen deaminase, which affects the production of the oxygen-binding prosthetic group of hemoglobin. Major symptoms include abdominal pain or cramping and neuropathies, sometimes leading to misdiagnosis as a psychiatric disorder.

A nearly total absence of immunoglobulins resulting in the loss of ability to produce immune antibodies.

See: Anti-Hemophilic Factor

See: Acquired Immunodeficiency Syndrome

An unusually severe allergic reaction, usually to food, drug, or insect bite. It occurs between an allergic antigen, and IgE bound to mast cells, stimulating the sudden release of immunological mediators locally and throughout the body. Initial symptoms appear within minutes, but recurrence may follow hours later. Hypersensitivity must have been in [..]