Category: Av-Az

A type of tuberculosis affecting birds, caused by Mycobacterium avium, which may be communicated to other animals and humans.

A highly contagious viral disease with up to 100 percent 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…

A highly contagious viral disease with up to 100 percent 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…

Canadian-born American bacteriologist who demonstrated in 1944 that DNA was the material that caused genetic changes in bacteria. His work was vital to scientists who later established that DNA is the carrier of genetic information in all living organisms.

Avascular necrosis (AVN) of the femoral head is a pathologic process that results from interruption of blood supply to the bone. It is also called aseptic necrosis or osteonecrosis. Conditions associated with aseptic necrosis include alcoholism, diabetes mellitus, extended periods of steroid usage, sickle cell disease, Gaucher’s disease, and trauma. A hip disorder in children due to interruption of the blood supply to…

A condition in which poor blood supply to an area of bone leads to bone death. Abbreviated AVN. Also known as aseptic necrosis and osteonecrosis.

Atrioventricular node.

An abnormal connection between an artery and a vein. This causes blood to flow directly from the artery into the vein, bypassing the capillaries that are located downstream of the fistula, resulting in a diminished blood supply. AV fistulas can occur anywhere in the body, but are common in the legs. Sometimes, an AV fistula…

AV is the standard medical abbreviation for atrioventricular, a combination that means pertaining to the atria (the upper chambers of the heart) and the ventricles (the lower chambers of the heart). For example, the AV node is an electrical relay station between the atria and the ventricles. Electrical signals from the atria must pass through…