West Nile virus
Severe neurologic illness from West Nile virus may include encephalitis, meningoencephalitis, or poliomyelitis. Symptoms of severe disease can include high fever, nuchal rigidity, confusion, disorientation, obtundation, memory loss, severe muscle weakness, paralysis, tremors, and seizures. One person out of every 150 to 250 infected develops severe disease, with penetration of the virus into the central nervous system dependent on the degree and persistence of viremia, and also facilitated by altered blood-brain barrier permeability.
Oct. 21, 2020