Encephalitis can occur with few to no symptoms or with flu-like symptoms such as headaches, fever, muscle aches, joint pain and fatigue, according to Mayo Clinic. More serious cases of the disease may cause confusion, seizures, double vision, loss of consciousness and localized paralysis.
Encephalitis is a condition in which the brain becomes inflamed, according to Mayo Clinic. This condition may occur as a result of viral or bacterial infections. It can cause flu-like symptoms, no symptoms or severe, debilitating neurological symptoms. The condition is treatable if caught early, and severe cases of encephalitis are very rare. However, severe cases of the condition are potentially fatal.