Pig disease outbreak prompts mass cull across Switzerland

More than 10,500 pigs are being slaughtered or put down across Switzerland, as veterinary authorities work to contain an outbreak of highly contagious enzootic pneumonia. The infection has reached 60 breeding and fattening farms in 14 cantons, prompting a coordinated response across the country’s livestock sector.

The Lucerne cantonal veterinary service detected the outbreak on September 9, 2026, within a large network of pig farms operating across several cantons. Authorities have since ordered the complete clearance of 20 farms in six cantons. At another 40 affected fattening farms, animal movement restrictions remain in place.

The measures are designed to prevent infected animals from carrying the disease to additional herds. Cantonal veterinarians are assessing each farm individually and visiting neighbouring holdings to check the health of nearby pigs.

The outbreak has created an immediate burden for farmers, who face the loss of animals and interruptions to normal production. Authorities say farmers whose herds are culled on official orders will be compensated. The response also comes as Swiss pig producers face tighter biosecurity expectations linked to the wider threat of contagious swine diseases.

Lucerne accounts for 5,200 of the pigs culled so far, making it the hardest hit canton in the national outbreak. Veterinary authorities have cleared animals from 10 breeding farms and one fattening farm there.

The scale of the Lucerne response reflects the canton’s role in the Swiss pig sector and the concentration of farms linked to the affected network. Each holding is being assessed separately, with officials examining the likelihood that infection has spread through animal transfers or contact between farms.

Bern has recorded a second major impact. Three breeding farms there held around 1,700 animals affected by the response. In Vaud, authorities culled 950 pigs on one farm. A second Vaud farm will be allowed to complete its fattening cycle before it is sanitised, according to the veterinary authorities.

The affected cantons also include Neuchâtel and Valais, extending the outbreak into French speaking Switzerland. The figures reported by the cantons represent different stages of the response, including slaughter, humane destruction and planned clearance. They should therefore be read as a picture of the current operation, rather than as separate totals that can be added together without qualification.

Animal transfers are prohibited at affected holdings until infection has been ruled out or the herd has been cleared. The restrictions apply to farms where officials are still monitoring the situation, including the 40 fattening farms under movement controls.

Cantonal veterinary services are checking neighbouring farms because enzootic pneumonia can move through connected production networks. Officials are asking farmers to maintain strict separation between herds, monitor animals closely and follow updated biosecurity procedures governing people, equipment and animal movements.

The response follows new biosecurity requirements issued by the Federal Food Safety and Veterinary Office in September to strengthen protection against African swine fever and other contagious threats. Those rules form part of a broader effort to reduce the risk that diseases enter or circulate through Swiss farms.

So far, authorities have found no indication that farms outside the affected area are infected. That assessment remains conditional. Movement restrictions will continue until veterinary checks provide sufficient evidence that a herd is clear. The approach places the emphasis on surveillance and containment before normal transfers resume.