Criteria of the New York City Department of Health for a Suspected Case of West Nile Virus infection: one or more of the following:
(1) all of the following:
(1a) fever >= 38°C (100°F)
(1b) CNS involvement
(1c) an abnormal CSF profile suggesting a viral etiology
(2) aseptic meningitis in a person >= 17 years of age.
(3) Guillain-Barre syndrome, particularly with atypical findings such as fever, altered mental status or CSF pleocytosis.
CNS involvement: one or more of the following:
(1) altered mental status (altered level of consciousness, confusion, agitation, or lethargy)
(2) cranial nerve palsies
(3) paresis
(4) paralysis
(5) convulsions
CSF profile:
(1) negative bacterial stain and culture
(2) pleocytosis with white cell count from 5 - 1,500 per µL
(3) elevation of protein >= 40 mg/dL
