Acute thrombocytopenic purpura: Sudden onset of low blood platelet levels, with bleeding into the skin and elsewhere. Abbreviated ATP. ATP can have many causes; for example, it can be a potentially serious complication during the acute phase of measles infection.
- Acute tubular necrosis
Acute tubular necrosis: A severe form of acute renal failure that develops in people with severe illnesses (such as sepsis) or with very low blood pressure. Patients may need dialysis. Kidney function often improves if the underlying disease is successfully treated. Abbreviated ATN. Many times the term is used synonymously with the term acute renal […]
- Acute-phase protein
Acute-phase protein: A protein whose plasma concentrations increase during certain inflammatory disorders. Perhaps the best-known acute-phase protein is C-reactive protein (CRP).
Acyclovir: (Brand name: Zovirax) One of a group of antiviral drugs that acts against the herpes viruses, including: Herpes simplex 1, which causes cold sores Herpes simplex 2, which causes genital herpes Varicella-zoster, which causes both chickenpox and shingles Epstein-Barr virus, which causes infectious mononucleosis Acyclovir inhibits the replication of viral DNA needed for the […]
- Acute idiopathic polyneuritis
Acute idiopathic polyneuritis: Also known as the Guillain-Barre syndrome, a disorder characterized by progressive symmetrical paralysis and loss of reflexes, usually beginning in the leg, with in most cases nearly complete or complete recovery. The Guillain-Barre syndrome is not associated with fever. There is paralysis involving more than one limb, most commonly the legs, and […]
- Acute HIV infection
Acute HIV infection: The body’s initial reaction to infection by the HIV virus. Acute HIV infection is a flu-like syndrome that occurs immediately after a person contracts HIV (the human immunodeficiency virus 1, the agent that causes AIDS). The syndrome is characterized by fever, sore throat, headache, skin rash and swollen glands (lymphadenopathy). This syndrome […]