African Swine Fever Warning Hides in a Feed Ingredient

African swine fever is the sort of phrase that can make a hog producer set down their coffee. A report in Emerging Infectious Diseases focuses on infectious ASF virus detected in spray-dried porcine plasma used as a feed ingredient in South Korea. That is a serious reminder that disease risk can travel through channels farmers may not see coming.

ASF does not need much help to cause havoc. It can devastate pig herds, trigger culling, shut down movement, disrupt exports, and shake feed and meat markets far beyond the first infected farm. Because there is no simple on-farm cure once it gets established, prevention is the whole ballgame.

Feed ingredients deserve special attention because modern livestock systems rely on complex supply chains. A ration may look simple in the trough, but behind it are processors, transporters, importers, storage facilities, and quality controls. If one link is weak, pathogens can hitch a ride like burrs on a pant leg.

For producers, this means asking sharper questions of feed suppliers. Where do high-risk animal-origin ingredients come from? What heat treatment, holding time, testing, and traceability are in place? Are there alternatives during outbreaks or periods of elevated risk? Biosecurity is not only boots, gates, and visitor logs; it is also procurement paperwork and supplier discipline.

The practical takeaway is not panic, but vigilance. Feed mills, veterinarians, regulators, and farmers need to keep tightening the net. ASF is a thief that looks for gaps, and in pork production, the smallest gap can become a very expensive gate left open.