Farm Animals

Pig PRRS Genomic Selection Welfare

Genomic selection for PRRS resistance represents a transformative welfare opportunity for pig production in PRRS-endemic regions.

Key Facts

Specific CD163 gene variants confer near-complete resistance to PRRS virus infection
Gene-edited pigs lacking functional CD163 do not develop PRRS disease when challenged
Regulatory approval for gene-edited livestock varies by jurisdiction with US more permissive than EU
PRRS causes estimated welfare losses affecting over 60 million pigs annually in the USA alone
Commercial deployment of PRRS-resistant genetics could eliminate one of pig farming's worst welfare challenges

Welfare Considerations

PRRS causes reproductive failure in sows, respiratory disease in piglets, and systemic illness affecting millions of pigs. Genetic resistance would eliminate this welfare burden permanently without ongoing treatment or biosecurity costs.

What You Can Do

Support research into PRRS-resistant genetics and regulatory frameworks for gene-edited livestock
Advocate for science-based regulatory approaches that allow welfare-beneficial genetic technologies
Stay informed about commercial availability of PRRS-resistant genetics in your jurisdiction