Inflammation of brain parenchymal tissue as a result of viral infection. encephalitis may occur as primary or secondary manifestation of togaviridae infections; herpesviridae infections; adenoviridae infections; flaviviridae infections; bunyaviridae infections; picornaviridae infections; paramyxoviridae infections; orthomyxoviridae infections; retroviridae infections; and arenaviridae infections.

Viral encephalitis is inflammation of the brain parenchyma, called encephalitis, by a virus. The different forms of viral encephalitis are called viral encephalitides...