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Animal and Plant Health Inspection Service
U.S. Department of Agriculture
USDA FAQ's and resources about coronavirus (COVID-19).  LEARN MORE
How to Protect Your Pigs Against African Swine Fever
The highly contagious and deadly African swine fever spreads rapidly and affects domestic and wild swine. Just one pig with African swine fever can wipe out every pig in the area. Owners of small farms with pigs, homesteads, or companion animals can take basic steps to protect their pigs.

How Transmission Can Occur

Although people cannot get African swine fever, they can carry it on clothing, shoes, and equipment. Sources of the infection include garbage feeding, contaminated personnel, equipment and vehicles, contaminated feed, or water, infected domestic or wild pigs, soft ticks, stable flies and semen. The most common sources of transmission include:

man feeding pig

Direct contact occurs when healthy pigs have contact with infected domestic or wild swine or come in contact with infected saliva, urine, feces, or aerosolized respiratory secretions via coughing or sneezing.

Indirect transmission happens when healthy pigs eat virus-contaminated feed, pork products, or come into contact with the virus on clothing, shoes, equipment, vehicles, or food waste.

This occurs when a soft tick acts as a vector, feeding on infected pigs and spreading the virus to healthy swine. Other insects like stable flies, leeches, and swine lice may also spread it.


Stay Vigilant: Know the Signs

To protect our pigs from African swine fever, you must be alert to the signs of this deadly virus:

Pig Icon - High Fever

High Fever

Pig Icon - Decreased appetite and weakness

Decreased appetite and weakness

Pig Icon - Red, blotchy skin, or skin lesions

Red, blotchy skin, or skin lesions

Pig icon - Diarrhea and vomiting

Diarrhea and vomiting

Pig Icon - Coughing and difficulty breathing

Coughing and difficulty breathing

Pig Icon - Abortions or sudden death

Abortions or sudden death


Report Any Signs

Immediately report animals with any signs to state or federal animal health officials or call USDA for appropriate testing and investigation.

Call USDA at 1-866-536-7593
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