Japanese encephalitis virus, a flavivirus, is
endemic in Southeast Asia, parts of China, and the Indian Subcontinent; in
specific areas, it may be an important cause of AFP (Acute flaccid paralysis). Electrophysiologic
studies suggest that Japanese encephalitis virus myelitis is caused by anterior
horn cell damage, and the clinical presentation mimics poliomyelitis in many
respects, including weakness and wasting beyond 60 days after onset of
paralysis.