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hand, foot, and mouth disease

(Encyclopedia)hand, foot, and mouth disease (HFMD), infectious viral disease that most commonly occurs in children under five years of age. Symptoms include fever, poor appetite, and a sore throat, followed by pain...

infectious canine hepatitis

(Encyclopedia)infectious canine hepatitis, acute viral disease of canines, especially dogs and foxes. The causative agent, an adenovirus, is not infectious to humans. In foxes the disease is manifested primarily as...

American Society for the Prevention of Cruelty to Animals

(Encyclopedia)American Society for the Prevention of Cruelty to Animals (A.S.P.C.A.), chartered in 1866 in New York by Henry Bergh to shelter homeless animals, to assist farmers in caring for their livestock, and t...

air traffic control

(Encyclopedia)air traffic control, the system by which airplanes are safely routed into and out of major airports. Air traffic control in the United States is centered in a number of regional control centers that r...

automatic frequency control

(Encyclopedia)automatic frequency control: see automatic tuning control. ...

automatic tuning control

(Encyclopedia)automatic tuning control (ATC), method or device to keep a radio or television receiver automatically tuned to a desired frequency or channel. Assuming that the receiver is at least approximately tune...

riot-control gas

(Encyclopedia)riot-control gas: see poison gas; tear gas. ...

blackleg

(Encyclopedia)blackleg or black quarter, acute infectious disease of cattle, less often of sheep, caused by an organism of the genus Clostridium. It is characterized by inflammation of muscles with swelling and pai...

HIV

(Encyclopedia)HIV, human immunodeficiency virus, either of two closely related retroviruses that invade T-helper lymphocytes and are responsible for AIDS. There are two types of HIV: HIV-1 and HIV-2. HIV-1 is respo...

Crohn's disease

(Encyclopedia)Crohn's disease: see colitis.