Sheep encephalomyelitis (Greek: έντσεφαλομυελιτις [εν-] – “filled with the brain” + -μύελος – “spinal cord”) is a viral disease caused by a flavivirus from the flaviviridae family, belonging to the group onny diseases. It is transmitted to another animal or person through nerve endings. The symptoms of the disease are similar to a stroke; memory and attention deteriorate.