West Nile Fever
Most people who become infected with West Nile virus (WNV) develop no clinical illness or symptoms. In previous outbreaks in the Northern Hemisphere, an estimated 80% of people who became infected with WNV never developed symptoms attributed to the infection.Of the approximately 20% of infected people who do develop symptoms, most develop what has been termed West Nile fever.The incubation period for WNV infection is thought to range from about 2-14 days, although longer incubation periods have been documented.
Clinical Features of West Nile Fever
Skin rash on the trunk of the body (occasionally)
Swollen lymph glands (occasionally)
Eye pain (occasionally)
Information provided by the CDC. Additional information is available at:
CDC - West Nile Virus: Clinical Description
The links below provide information for clinicians that may be useful in assessing patients that show symptoms of West Nile virus.
West Nile Virus Information and Guidance for Clinicians
West Nile Virus Case History Form
Diagnostic Testing Guidelines for West Nile Virus
County of San Diego Physician Bulletin Archives: