Treatment of Viral Encephalitis.

Viral encephalitis is difficult to treat. Herpes simplex encephalitis has been successfully treated with acyclovir, but is still a cause for significant morbidity even with that treatment. A rare form of autoimmune encephalitis related to NMDA receptor antibody after infection by herpes simplex can be treated with corticosteroid therapy. Arthropod-borne encephalitides, such as West Nile virus encephalitis and Eastern equine encephalitis, are primarily treated with supportive measures. Attempts have been made to use immunoglobulin therapy with limited effects. Progressive multifocal leukoencephalopathy has been treated with an emerging immune activation therapy in a limited number of patients with incomplete success.