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| This glossary contains: 19186 medical terms |
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Avian influenza
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Avian influenzaAlso called fowl plague, avian flu, and bird flu. A highly contagious viral disease with up to 100% mortality in domestic fowl. Caused by influenza A virus subtypes H5 and H7. All types of birds are susceptible to the virus but outbreaks occur most often in chickens and turkeys. The infection may be brought by migratory wild birds which can carry the virus but show no signs of disease. Humans are only rarely affected.
RELATED TERMS--------------------------------------
Plague
1. Any contagious epidemic disease that is deadly. 2. An infectious disease caused by Yersinia pestis that can be spread from animals to humans and is normally spread to humans by fleas (called bubonic plague) or from person to person by respiratory droplets (called pnenmonic plague). Both forms have a high death rate.
Flu
Short for influenza. The flu is caused by viruses that infect the respiratory tract which are divided into three types, designated A, B, and C. Most people who get the flu recover completely in 1 to 2 weeks, but some people develop serious and potentially life-threatening medical complications, such as pneumonia. Much of the illness and death caused by influenza can be prevented by annual influenza vaccination.
Contagious
Easily transmitted by direct or indirect contact.
Disease
Illness or sickness often characterized by typical patient problems (symptoms) and physical findings (signs). Disruption sequence: The events that occur when a fetus that is developing normally is subjected to a destructive agent such as the rubella (German measles) virus.
Mortality
Statistics on deaths within a population based on official death certificates, usually showing numbers of deaths by age, sex and cause.
Influenza
An acute viral infection involving the respiratory tract. It is marked by inflammation of the nasal mucosa, the pharynx, and conjunctiva, and by headache and severe, often generalized, myalgia.
Virus
Ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein.
Infection
Anything that invades the body and reproduces. Infections can be bacteria, protozoa, fungi, or viruses. Bacteria and fungi are one celled creatures that cause many infections including strep throat, bladder infections, and some lung infections. Fungi cause “athlete’s foot” and thrush, an infection in the mouth. Protozoa are small organisms with many cells that can cause infections in the guts or in the lungs. Most healthy people do not get protozoal infections, but people with suppressed immune systems can. Viruses are not really organisms; they are tiny particles that can live only inside another cell. They reproduce by taking over a cell and causing that cell to make more virus particles, rather than doing what the cell is supposed to do. Viruses cause most colds and flu cases.
SIMILAR TERMS--------------------------------------
Avian flu
See: Avian influenza.
Avian tuberculosis
See: Tuberculosis, avian.
Aviane-21
Aviane-21 is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): ethinyl estradiol; levonorgestrel.
Aviane-28
Aviane-28 is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): ethinyl estradiol; levonorgestrel.
PREVIOUS AND NEXT TERMS--------------------------------------
Avascular necrosis of the femoral head
See Legg-Calv‚-Perthes disease.
Avastin
The first drug in a new class designed to treat cancer by compromising its blood supply. Avastin (bevacizumab) prevents angiogenesis, the formation of new blood vessels that supply the tumor with blood, oxygen and other nutrients and allow the tumor to grow and metastasize to other sites in the body. Avastin is a monoclonal antibody, a type of genetically engineered protein, that binds to another protein called vascular endothelial growth factor (VEGF) which spurs the growth of blood vessels. Blocking VEGF is thought to be the mechanism by which Avastin cuts off the supply of vessels that spring up to feed a tumor.
Avery
See: Avery, Oswald Theodore
Avery, MacLeod, and McCarty
"Authors of a scientific paper entitled ""Studies on the chemical nature of the substance inducing transformation of pneumococcal types"" "
Avian flu
See: Avian influenza.
Avian influenza
Avian tuberculosis
See: Tuberculosis, avian.
AVM
An AVM (arteriovenous malformation) is a congenital disorder (one present at birth) of blood vessels in the brain, brainstem, or spinal cord that is characterized by a complex, tangled web of abnormal arteries and veins connected by one or more fistulas (abnormal communications).The AVM has no capillary bed of its own and the fistulas in the AVM permit high-speed, high-flow shunting of blood from the arterial to the venous side of the circulation. This shunting causes low blood pressure (hypotension) in the arterial vessels feeding the AVM and neighboring areas of the brain that they normally supply with blood.AVMs typically cause problems before the age of 40. The most common symptoms of AVM include hemorrhaging (bleeding), seizures, headaches, and neurological problems such as paralysis or loss of speech, memory, or vision. The frequency of hemorrhage in various series ranges from 30-82%. AVM rupture accounts for 2% of all strokes.
AVM (arteriovenous malformation)
An arteriovenous malformation (AVM) is a congenital disorder (one present at birth) of blood vessels in the brain, brainstem, or spinal cord that is characterized by a complex, tangled web of abnormal arteries and veins connected by one or more fistulas (abnormal communications).
AVN
Avascular necrosis.
Avulse
To separate or tear away a body part, as from an accident or surgery. While playing football, he avulsed a spinous process.
RELATED TERMS--------------------------------------
Plague
1. Any contagious epidemic disease that is deadly. 2. An infectious disease caused by Yersinia pestis that can be spread from animals to humans and is normally spread to humans by fleas (called bubonic plague) or from person to person by respiratory droplets (called pnenmonic plague). Both forms have a high death rate.
Flu
Short for influenza. The flu is caused by viruses that infect the respiratory tract which are divided into three types, designated A, B, and C. Most people who get the flu recover completely in 1 to 2 weeks, but some people develop serious and potentially life-threatening medical complications, such as pneumonia. Much of the illness and death caused by influenza can be prevented by annual influenza vaccination.
Contagious
Easily transmitted by direct or indirect contact.
Disease
Illness or sickness often characterized by typical patient problems (symptoms) and physical findings (signs). Disruption sequence: The events that occur when a fetus that is developing normally is subjected to a destructive agent such as the rubella (German measles) virus.
Mortality
Statistics on deaths within a population based on official death certificates, usually showing numbers of deaths by age, sex and cause.
Influenza
An acute viral infection involving the respiratory tract. It is marked by inflammation of the nasal mucosa, the pharynx, and conjunctiva, and by headache and severe, often generalized, myalgia.
Virus
Ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein.
Infection
Anything that invades the body and reproduces. Infections can be bacteria, protozoa, fungi, or viruses. Bacteria and fungi are one celled creatures that cause many infections including strep throat, bladder infections, and some lung infections. Fungi cause “athlete’s foot” and thrush, an infection in the mouth. Protozoa are small organisms with many cells that can cause infections in the guts or in the lungs. Most healthy people do not get protozoal infections, but people with suppressed immune systems can. Viruses are not really organisms; they are tiny particles that can live only inside another cell. They reproduce by taking over a cell and causing that cell to make more virus particles, rather than doing what the cell is supposed to do. Viruses cause most colds and flu cases.
SIMILAR TERMS--------------------------------------
Avian flu
See: Avian influenza.
Avian tuberculosis
See: Tuberculosis, avian.
Aviane-21
Aviane-21 is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): ethinyl estradiol; levonorgestrel.
Aviane-28
Aviane-28 is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): ethinyl estradiol; levonorgestrel.
PREVIOUS AND NEXT TERMS--------------------------------------
Avascular necrosis of the femoral head
See Legg-Calv‚-Perthes disease.
Avastin
The first drug in a new class designed to treat cancer by compromising its blood supply. Avastin (bevacizumab) prevents angiogenesis, the formation of new blood vessels that supply the tumor with blood, oxygen and other nutrients and allow the tumor to grow and metastasize to other sites in the body. Avastin is a monoclonal antibody, a type of genetically engineered protein, that binds to another protein called vascular endothelial growth factor (VEGF) which spurs the growth of blood vessels. Blocking VEGF is thought to be the mechanism by which Avastin cuts off the supply of vessels that spring up to feed a tumor.
Avery
See: Avery, Oswald Theodore
Avery, MacLeod, and McCarty
"Authors of a scientific paper entitled ""Studies on the chemical nature of the substance inducing transformation of pneumococcal types"" "
Avian flu
See: Avian influenza.
Avian influenza
Avian tuberculosis
See: Tuberculosis, avian.
AVM
An AVM (arteriovenous malformation) is a congenital disorder (one present at birth) of blood vessels in the brain, brainstem, or spinal cord that is characterized by a complex, tangled web of abnormal arteries and veins connected by one or more fistulas (abnormal communications).The AVM has no capillary bed of its own and the fistulas in the AVM permit high-speed, high-flow shunting of blood from the arterial to the venous side of the circulation. This shunting causes low blood pressure (hypotension) in the arterial vessels feeding the AVM and neighboring areas of the brain that they normally supply with blood.AVMs typically cause problems before the age of 40. The most common symptoms of AVM include hemorrhaging (bleeding), seizures, headaches, and neurological problems such as paralysis or loss of speech, memory, or vision. The frequency of hemorrhage in various series ranges from 30-82%. AVM rupture accounts for 2% of all strokes.
AVM (arteriovenous malformation)
An arteriovenous malformation (AVM) is a congenital disorder (one present at birth) of blood vessels in the brain, brainstem, or spinal cord that is characterized by a complex, tangled web of abnormal arteries and veins connected by one or more fistulas (abnormal communications).
AVN
Avascular necrosis.
Avulse
To separate or tear away a body part, as from an accident or surgery. While playing football, he avulsed a spinous process.
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This dictionary contains 19186 terms.
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