Encephalitis, Arbovirus [Disease/Finding] West Nile Fever [Disease/Finding] A mosquito-borne viral illness caused by the WEST NILE VIRUS, a FLAVIVIRUS and endemic to regions of Africa, Asia, and Europe. Common clinical features include HEADACHE; FEVER; maculopapular rash; gastrointestinal symptoms; and lymphadenopathy. MENINGITIS; ENCEPHALITIS; and MYELITIS may also occur. The disease may occasionally be fatal or leave survivors with residual neurologic deficits. (From Joynt, Clinical Neurology, 1996, Ch26, p13; Lancet 1998 Sep 5;352(9130):767-71) C6500 D014901 West Nile Fever C0043124 N0000003161 M0022928 1024531 West Nile Fever Flavivirus Infections [Disease/Finding]