Antimicrobial resistance driven partly by agricultural antibiotic use threatens both human and animal health systems globally.
Antimicrobial resistance connects farm animal welfare to human health in ways that create unusual coalitions for change. When intensive farming systems require prophylactic antibiotics to prevent inevitable disease outbreaks in stressed, crowded animals, they contribute to the development and spread of resistant bacteria that undermine human medicine. Higher welfare systems that reduce disease incidence through better conditions, lower stress, and more appropriate stocking densities require fewer antibiotics and contribute less to resistance development. The welfare and public health cases for agricultural reform reinforce each other, making antibiotic stewardship one of the most powerful arguments for farm animal welfare improvement.