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Avian flu
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Avian fluSee: Avian influenza.
RELATED TERMS--------------------------------------
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.
SIMILAR TERMS--------------------------------------
Avian influenza
Also 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.
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--------------------------------------
AV node
An electrical relay station between the atria (the upper) and the ventricles (the lower chambers of the heart). Electrical signals from the atria must pass through the AV node to reach the ventricles. The AV node is one of the major elements in the cardiac conduction system, the system that controls the heart rate. This stunningly designed system generates electrical impulses and conducts them throughout the muscle of the heart, stimulating the heart to contract and pump blood.
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
Avian influenza
Also 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.
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.
RELATED TERMS--------------------------------------
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.
SIMILAR TERMS--------------------------------------
Avian influenza
Also 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.
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--------------------------------------
AV node
An electrical relay station between the atria (the upper) and the ventricles (the lower chambers of the heart). Electrical signals from the atria must pass through the AV node to reach the ventricles. The AV node is one of the major elements in the cardiac conduction system, the system that controls the heart rate. This stunningly designed system generates electrical impulses and conducts them throughout the muscle of the heart, stimulating the heart to contract and pump blood.
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
Avian influenza
Also 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.
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.
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This dictionary contains 19186 terms.
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