Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «S»:
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Strep throat
Strep throat: Strep throat is an infection caused by a type of bacteria called streptococcus, which can lead to serious complications if not adequately treated....
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Strep, group A
Strep, group A: A well-known strain (a type) of streptococcus (strep) bacteria that can cause strep throat and common skin problems such as impetigo as well as rheumatic fever.
Autoimmune reactions to strep have also recently been associated with a number of disorders, including guttate psoriasis ...
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Streptococcus
Streptococcus: A group of bacteria, familiarly known
as strep, that cause a multitude of diseases. The name
comes from the Greek strepto- meaning twisted + kokkos meaning berry, and that is exactly what strep look like under the microscope, like a twisted bunch of little round berries. Illness cau...
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Streptococcus faecalis
Streptococcus faecalis: Now called Enterococcus faecalis. See Enterococcus....
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Streptococcus haemolyticus
Streptococcus haemolyticus: Another name for streptococcus pyogenes....
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Streptococcus pneumoniae (pneumococcus)
Streptococcus pneumoniae (pneumococcus): A type of bacterium that comes in pairs and is shaped like a lancet (a surgical knife with a short wide two-edged blade).
Pneumococcus is the leading cause of bacterial pneumonia and otitis media (middle ear infections) and an important contributor to bacter...
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Streptococcus pyogenes
Streptococcus pyogenes: A common bacteria of the skin that causes strep throat (streptococcal pharyngitis), impetigo, other skin infections, rheumatic fever, scarlet fever,
glomerulonephritis, and invasive fasciitis....
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Streptococcus, group A
Streptococcus, group A: A well-known strain (type) of streptococcus (strep) bacteria that can cause strep throat and common skin problems such as impetigo as well as rheumatic fever.
Autoimmune reactions to strep have also recently been associated with a number of disorders, including guttate psor...
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Streptococcus, group B
Streptococcus, group B: A major cause of infections,
including infections involving the pregnant woman and her newborn
infant. Strep B can infect the mother's uterus, placenta, and urinary
tract; in fact, they are present in the vagina of 10 to 25 percent of
all pregnant women. Group B strep can...
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Stress
Stress: Forces from the outside world impinging on the individual. Stress is a normal part of life that can help us learn and grow. Conversely, stress can cause us significant problems.
Stress releases powerful neurochemicals and hormones that prepare us for action (to fight or flee). If we don't...
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Stress echocardiography
Stress
echocardiography: A supplement to the routine exercise cardiac stress test. During stress echocardiography, the sound waves of ultrasound are
used to produce images of the heart at rest and at the peak of exercise.
In a heart with normal blood supply, all segments of the
left ventricle (...
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Stress exercise thallium scan
Stress exercise thallium scan: A method of examining the heart to obtain information about the blood supply to the heart muscle. Special cameras take a series of pictures of the heart. A radioactive substance is injected into the bloodstream and serves as a tracer. The tracer attaches to certain cel...
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Stress fracture
Stress fracture: A fracture caused by repetitive
stress, as may occur in sports, strenuous exercise, or
heavy physical labor. Stress fractures are especially common in the
metatarsal bones of foot, particularly in runners.
Osteoporosis increases the possibility of stress fractures.
Treatment is...
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Stress test, pharmacologic
Stress test, pharmacologic: There are a diversity of pharmacologic stress tests. Here this refers specifically to a pharmacologic cardiac stress test in which certain medications are administered that stimulate the heart to mimic the physiologic effects of exercise.
One of the medications used in ...
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Stress test, physiologic
Stress test, physiologic:
Although there can be a diversity of physiologic
stress tests, this refers here to a
physiologic cardiac stress test in which certain medications are administered that stimulate the heart to mimic the physiologic effects of exercise.
One of these medications is dobutamin...
