What are the tests for west nile virus infection?

Several: Since the disease is usually asymptomatic and has no specific treatment, testing focuses on transmissibility person-to-person which is rare. Virus in the blood / spinal fluid by PCR proves infection. Igm anti-wnv suggests recent infection (up to a year), anti-wnv igg may take months to turn positive or be false-positive from dengue / immunization / other viruses. All blood is now screened.

A/W Dr. Friedlander: West Nile Virus can be identified with a Nucleic Acid Amplification test or checking for IgM & IgG antibodies. Neuroinvasive Dz such as WNV Encephalitis can be assessed via spinal tap.