Can west nile virus cause meningitis?

Encephalitis: The infection involves the substance of the brain, not just the coverings (meningitis), and can be rapidly deadly in susceptible hosts, real issue of death of nerve cell bodies in brain and spinal cord resulting in a poliomyelitis, with permanent weakness, yet, most immunologically competent hosts are either asymptomatic, or have a mild flulike reaction for a few days.

Yes: Severe illness can include problems like encephalitis, meningitis or complete flaccid paralysis.