B virus
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  B virus



B virus

   An infectious agent commonly found among macaque monkeys, including rhesus macaques, pig-tailed macaques, and cynomolgus monkeys. Monkeys infected with this virus usually have no or mild symptoms. In humans, however, B virus infection can result in a fatal encephalomyelitis. B virus disease in humans is extremely rare, but often fatal -- an estimated 80% of untreated patients die of complications associated with the infection.

RELATED TERMS
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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.

Encephalomyelitis
Inflammation of both the brain and the spinal cord. Encephalomyelitis can be caused by a variety of conditions that lead to inflammation of the brain and spinal cord. Among the common causes of encephalomyelitis are viruses which infect the nervous system. One type of encephalomyelitis, acute disseminated encephalomyelitis, occurs most commonly after an acute viral infection such as measles (rubeola) and is due to be an autoimmune attack upon the nervous system.

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.



SIMILAR TERMS
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Buerger’s Disease
Most commonly affects the small and medium sized arteries, veins, and nerves. The arteries of the arms and legs become narrowed or blocked, causing lack of blood supply (ischemia) to the fingers, hands, toes and feet.

Bundle Branch
The electrical impulses travel down a normal pathway through the heart. From the SA node, the impulse travels to the AV node. Then it goes to the bundle of His. The bundle divides into a right bundle and the left bundle. The bundles take the impulse through the ventricles (bottom chambers) to cause them to contract.

Bundle Branch Block
Normally, the electrical impulse travels down both the right and left bundle branches at the same speed and the ventricles contract at the same time. If there is a block in one of the branches, it is called a bundle branch block. A bundle branch block causes one ventricle to contract just after the other ventricle.

Bypass
A surgical procedure designed to increase blood flow to an organ or extremity that has narrowing or blockage of the blood supplying artery. Examples include coronary artery bypass surgery, aortic replacement, ABI (aorta-bi-iliac), ABF (aorto-bi-femoral), and femoral-popliteal bypass)

B variant GM2-gangliosidosis
See: Tay-Sachs disease.

B virus

B(a)P
Benzo(a)pyrene.

B-type natriuretic peptide
A 32-amino-acid polypeptide secreted by the ventricles of the heart in response to excessive stretching of myocytes (heart muscles cells) in the ventricles. The levels of B-type natriuretic peptide (BNP) are elevated in patients with left ventricular dysfunction. BNP levels correlate with both the severity of symptoms and the prognosis in congestive heart failure.

B burgdorferi
"Short for Borrelia burgdorferi, the cause of Lyme disease. Once the full name of a bacterium has been given, it is customary to refer to it in its short form. For example, ""Borrelia burgdorferi...is responsible for Lyme disease, which can lead to debilitating symptoms in humans....Estimates from prior studies of ticks infected with B. burgdorferi in Mendocino County are higher."" See also: Borrelia."

B cepacia
See: Burkholderia cepacia.

B coli
The protozoan parasite Balantidium coli. See: Balantidium.

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