Caused by a flavivirus that is transmitted to humans by mosquito bites or through contact with infected blood.
Most infections are asymptomatic; however, approximately 20% of patients develop West Nile fever. Of these patients, less than 1% progress to neuroinvasive disease.
Neurologic manifestations include encephalitis, meningitis, or flaccid paralysis syndrome known as West Nile poliomyelitis.
West Nile virus-specific IgM in serum or CSF establishes the diagnosis.
Treatment is supportive.
West Nile virus (WNV) is an infection caused by a flavivirus, which in most cases is asymptomatic, but can cause a self-limited influenza-like illness (West Nile fever or WNF) and, rarely, West Nile neuroinvasive disease (WNND).
Kunjin virus is a subtype of West Nile virus endemic to Oceania.
Associate Professor of International Health
Global Obesity Prevention Center
Director of Operations Research
International Vaccine Access Center (IVAC)
Johns Hopkins School of Public Health
BYL declares that he has no competing interests.
Use of this content is subject to our disclaimer