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Aseptic
Aseptic The absence of microorganisms. By contrast, something that just discourages the growth of microorganisms is antiseptic.
RELATED TERMS--------------------------------------
Contrast
"Short for ""contrast media."" Contrast media are X-ray dyes used to provide contrast, for example, between blood vessels and other tissue."
Antiseptic
Something that discourages the growth microorganisms. By contrast, aseptic refers to the absence of microorganisms.
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Aseptic bursitis
"Inflammation of a bursa that is not caused by infection. A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as ""bursitis."" Most commonly this is not an infectious condition (aseptic bursitis)."
Aseptic necrosis
Condition in which poor blood supply to an area of bone leads to bone death. Also called avascular necrosis and osteonecrosis.
Aseptic necrosis of bone
Death of a part or whole of a bone which often forms part of a joint. Usually occurs due to inadequate blood supply. (Avascular necrosis, Osteonecrosis).
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Ascending aorta
The ascending aorta is the first section of the aorta, the largest artery in the body. The ascending aorta starts from the left ventricle of the heart and extends to the arch (the bend) of the aorta. The right and left coronary arteries that supply blood to the heart muscle arise from the ascending aorta. The ascending aorta is an arbitrary anatomic entity. The aorta is one continuous conduit that stems from the left ventricle of the heart to carry blood to most of the body. The ascending aorta is, however, a hallowed and convenient division of the aorta.
Ascending pathway
A nerve pathway that goes upward from the spinal cord toward the brain carrying sensory information from the body to the brain. In contrast, descending pathways are nerve pathways that go down the spinal cord and allow the brain to control movement of the body below the head.
Ascus
An elongated spore case containing the spores of certain fungi including yeast.
ASCUS
An acronym for Atypical Squamous Cells of Undetermined Significance. This term is used in the Bethesda System for reporting Pap smear findings and indicates that some flat (squamous) cells look unusual and may or may not be pre-malignant or malignant. Of all Pap tests with an ASCUS reading, 90-95% are caused by benign conditions, chiefly infections. The remaining 5-10% prove to be precancer or cancer.
ASD
Acronym for atrial septal defect.
Aseptic
Aseptic bursitis
"Inflammation of a bursa that is not caused by infection. A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as ""bursitis."" Most commonly this is not an infectious condition (aseptic bursitis)."
Aseptic necrosis
Condition in which poor blood supply to an area of bone leads to bone death. Also called avascular necrosis and osteonecrosis.
Asexual
1. Without sexual desire or interest. Someone with seemingly no sexual drive. 2. Referring to reproduction without the combination of genetic material with another individual. Yeast can reproduce asexually by budding.
Asian cholera
A devastating and sometimes lethal disease with intense vomiting and profuse watery diarrhea was discovered in 1883 to be due to infection with the bacteria Vibrio cholerae.
Asian flu
A pandemic of influenza A (H2N2) in 1957-58. First identified in China in late February 1957, the Asian flu spread to the United States by June 1957 where it caused about 70,000 deaths. Also known as Asian influenza.Immunity to this strain of influenza A (H2N2) was rare in people less than 65 years of age, and a pandemic was predicted. In preparation, vaccine production began in late May 1957, and health officials increased surveillance for flu outbreaks. Unlike the virus that caused the 1918 pandemic, the 1957 pandemic virus was quickly identified, due to advances in scientific technology. Vaccine was available in limited supply by August 1957.
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