Evaluate for other causes of symptoms
PCR: virus can be identified in throat washings (early), CSF (early), and stool/rectal swab (highest yield)
CSF: Pleocytosis <unk> N predominance initially, then mostly lymphocytes), usually ~normal opening pressure, protein, and glucose.
Poliomyelitis
Japanese encephalitis
Pertussis
Rabies
Dengue
Viral hemorrhagic fevers
Leptospirosis
CMV neurologic disease