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By Jyme L. Nichols
Equine protozoal myeloencephalitis (EPM) is a neurologic disease caused by a parasite that attacks the brain and spinal cord of horses. The parasite, Sarcocystis neruona, can seriously damage a horse’s central nervous system leading to short- or long-term damage and even death if not caught and treated early. Researchers have determined that horses younger than 5 years of age and older than 13 are more likely to contract EPM, and most cases happen in the spring, summer and fall.