Pig PRRS Disease and Welfare Management

Porcine Reproductive and Respiratory Syndrome (PRRS) is one of the most economically and welfare-significant diseases in commercial pig farming, causing widespread suffering on affected farms.

Key Facts

PRRS virus causes reproductive failure in sows and respiratory disease in growing pigs, with mortality spikes during outbreaks
The disease has cost the global pig industry billions annually since its identification in the late 1980s
PRRS-affected piglets show labored breathing, reduced growth, and increased susceptibility to secondary infections
Biosecurity breakdowns are the primary cause of PRRS introduction to previously negative herds
Vaccination provides partial protection but does not eliminate the virus from positive herds
PRRS-free herd status, achievable through strict biosecurity and depopulation/repopulation, significantly improves welfare and productivity

Welfare Considerations

PRRS outbreaks represent acute welfare crises on affected farms. Sows experiencing reproductive PRRS lose litters, produce mummified fetuses, and suffer from fever and respiratory distress. Growing pigs develop chronic respiratory disease with labored breathing, wasting, and painful secondary infections. The suffering during outbreaks can be severe and widespread across hundreds or thousands of animals simultaneously. Welfare-conscious pig farming must include comprehensive PRRS prevention through biosecurity, vaccination programs, and monitoring. The economic and welfare case for PRRS-free production is compelling - herds that achieve and maintain PRRS-negative status have measurably better welfare and health outcomes.

What You Can Do

Support pig farmers investing in PRRS vaccination and biosecurity to reduce disease burden
Choose pork from farms with demonstrated disease management and health monitoring programs
Advocate for disease monitoring systems that include welfare outcome reporting alongside production metrics
Support veterinary research into improved PRRS vaccines and control strategies
Reduce overall pork consumption to decrease pressure on intensive systems where disease spread is harder to control
Ask retailers about their supplier health and welfare standards when purchasing pig products