EPM is a serious neurological disease of horses caused by Sarcocystis neurona, requiring prompt diagnosis and treatment to minimize permanent damage.
EPM causes neurological dysfunction that is frightening and disabling for affected horses. Ataxia impairs balance and movement; muscle atrophy causes weakness; cranial nerve deficits can affect vision, swallowing, and facial function. Treatment significantly improves outcomes when started early, making recognition of subtle early signs critical. Horses with residual neurological deficits require adapted management to maintain quality of life safely.