Wildlife Disease Spillover: Livestock and Wild Animal Interface

Disease transmission at the livestock-wildlife interface affects both domestic animal welfare and wild animal populations, requiring integrated management approaches.

Key Facts

Bovine tuberculosis in badgers and cattle is among the most studied livestock-wildlife disease interfaces in Europe
Brucellosis transmitted between bison and cattle has driven controversial bison management in Yellowstone
Avian influenza spreads between wild migratory birds and domestic poultry with significant welfare consequences
African swine fever has spread from wild boar into domestic pig populations across Europe and Asia
One Health approaches integrate human, animal, and environmental health in disease management frameworks

Welfare Considerations

Disease spillover at the livestock-wildlife interface causes welfare harm in both directions: wild animals that carry or contract diseases experience welfare consequences from the disease itself and from control measures including culling; domestic animals affected by wildlife-origin diseases experience suffering and often mass mortality events. Management approaches that focus on lethal control of wild reservoir species — badger culling for bovine tuberculosis, bison culling for brucellosis — are controversial because the welfare cost to wildlife is direct and certain while the benefit to livestock welfare is contested by evidence. Vaccination programmes, biosecurity measures, and habitat management that reduces interface contact offer alternatives that achieve disease control with lower wildlife welfare costs.

What You Can Do

Support One Health disease management approaches that integrate wildlife welfare consideration
Advocate for vaccination programmes as an alternative to lethal culling for disease control where evidence supports it
Engage with livestock disease management debates that affect wildlife populations in your region
Support biosecurity investment that reduces livestock-wildlife contact at farm boundaries
Encourage transparent evidence review in disease management policy that weighs wildlife welfare costs