equine protozoal myeloencephalitis (EPM)

Equine protozoal myeloencephalitis (EPM) is a frustrating disease. It’s been referred to as one of the most overdiagnosed, underdiagnosed and misdiagnosed equine diseases – an apt description. In some areas, every horse (particularly every racehorse) that has any real or perceived abnormality (such as not running fast enough) gets treated, usually without any attempt to