Antimicrobial resistance: The result of microbes changing in ways that reduce or eliminate the effectiveness of drugs, chemicals, or other agents to cure or prevent infections.
Antimony: A silvery-white earth metal which at high levels can be toxic. Antimony occurs naturally in the earth. Antimony ores are mined and then mixed with other metals to form antimony alloys or combined with oxygen to form antimony oxide. Antimony breaks easily, but when mixed into alloys, it is used in lead storage batteries, […]
Antineoplastic: Acting to prevent, inhibit or halt the development of a neoplasm (a tumor). An agent with antineoplastic properties. For example, oxaliplatin (Eloxatin) is an antineoplastic used in the treatment of metastatic colon cancer. The term is applicable to dozens of other chemotherapy agents used to treat this an other forms of cancer.
- Antinuclear antibody
homogeneous, or diffuse; speckled; nucleolar; and peripheral or rim. While these patterns are not specific for any one illness, certain illnesses can more frequently be associated with one pattern or another. For example, the nucleolar pattern is more commonly seen in the disease scleroderma. The speckled pattern is seen in many conditions and in persons […]
- Antinuclear antibody test
Antinuclear antibody test: A test for unusual antibodies that are directed against structures within the nucleus of the cell. Antinuclear antibodies (ANAs) indicate the possible presence of autoimmunity. The fluorescent antinuclear antibody test (FANA) was designed by George Friou, M.D. in 1957. It is done on a blood sample. The antibodies in serum are exposed […]
Antioxidant: A substance that reduces damage due to oxygen, such as that caused by free radicals. Well-known antioxidants include enzymes and other substances, such as vitamin C, vitamin E, and beta carotene, which are capable of counteracting the damaging effects of oxidation. Antioxidants are also commonly added to food products such as vegetable oils and […]