U.S. Department of Agriculture: Agricultural Research Service, Lincoln, Nebraska

 

Date of this Version

1959

Citation

1959 Authors

Abstract

I. WHAT IS HOG CHOLERA?

Hog cholera is a deadly, contagious disease that attacks swine only.

The disease is caused by hog cholera virus, an agent so small (1/250,000 of an inch) that it can even pass through a fine porcelain filter.

How do hogs act when they get the disease? They lie around "hiding in their nest," have high fevers, are extremely weak and "sick all over." They have little appetite, and often stand in a "thinking" attitude-motionless, tail relaxed, ears hanging limp, and the head slightly lowered as if in deep thought.

Very few hogs ever recover.

II. How IMPORTANT Is HOG CHOLERA?

Hog cholera is the most important disease of hogs in the United States today. Farmers lose millions of dollars worth of hogs from cholera each year. And the expense of annually vaccinating millions of hogs costs even more. Many foreign markets are closed to pork from the United States because of the fear of importing hog cholera.

The disease is important enough so that both state and federal governments have enacted regulatory measures and classed it as a reportable disease. In addition, the United States Congress has authorized the Secretary of Agriculture to enter into a marketing agreement with the hog cholera serum-virus industry. The original act was intended to provide that there should always be enough anti-hog cholera serum on hand to safeguard against sudden widespread outbreaks of the disease. Nevertheless, stocks of antiserum are being reduced every year.

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