This study of 147 pig farms in England was undertaken to determine what factors influence Post Weaning Multi-systemic Wasting Syndrome (PMWS). The study found that the living conditions of pigs is tied to the likelihood they will contract the disease.

PMWS occurs in baby pigs just after weaning, and has about a 30% mortality rate. Researchers determined that the factors associated with contracting the disease center around the environment in which pigs are raised. PMWS is less likely at farms with “clean, enriched environments,” that provide more space, and that rear pigs outdoors.