hog cholera


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classical swine fever

classical swine fever or hog cholera, acute, highly infectious viral disease of swine, historically perhaps the most serious disease of swine in North America. It is characterized by dullness and listlessness, loss of appetite, rise in temperature to between 105℉ (41℃) and 107℉ (42℃), diarrhea, and often death. Purple hemorrhagic areas will appear on the abdomen and many pigs display nervous signs, such as circling, incoordination, muscle tremors, and convulsions. Mortality is very high and recovered animals are permanently stunted.

The disease is transmitted readily by direct or indirect contact. The virus may enter a herd through contaminated feed, water, equipment, or by contact with an infected animal or person. At one time, feeding pigs raw garbage containing pork scraps from infected pigs was a common cause of infection. For this reason the United States and many other countries now prohibit the feeding of uncooked garbage to pigs. A program was established in the United States to eliminate all possible sources of virus introduction, and the disease was eradicated in 1978. A vaccine is available in areas where the disease is still present.

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hog cholera

[′häg ‚käl·ə·rə]
(veterinary medicine)
A fatal infectious virus disease of swine characterized by fever, diarrhea, and inflammation and ulceration of the intestine; secondary infection by Salmonella cholerae suis is common. Also known as African swine fever.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Ten pigs suspected of being infected with hog cholera have been found on a pig farm in the town of Takaono in the prefecture and the ministry believes unauthorized vaccines caused the infection.
The Ministry of Agriculture, Forestry and Fisheries said Friday it has banned imports of pork and processed pork products from Spain in response to reports of an outbreak of hog cholera there.
It is designed to prevent the hog cholera virus from entering Japanese farms, it said.
Hog cholera, a bane to American farmers since its appearance in the Ohio Valley in the 1830's, today represents another animal health success story with a strong ARS connection.
debut, hog cholera had spread to at least 35 states; a single Indiana company lost 11,000 hogs in the fall of 1896.
And in the days before vaccinations and antibiotics were common, hog cholera also posed a very real threat.
Currently certain imports from Austria are banned because of the hog cholera outbreak.
Promotional claims ("Prevents Disease!") were likely exaggerated, but farmers desperate to protect herds against hog cholera saw oilers as cheap insurance.