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West Nile Virus Testing

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Also known as: WNV Tests; WNV by NAAT
Formal name: West Nile Virus, IgM and IgG Antibodies and Nucleic Acid Amplification Tests

At a Glance

Why Get Tested?

To help diagnose an infection caused by West Nile virus (WNV); to determine the cause of viral meningitis or encephalitis or febrile illness that occurs during the summer season; to detect the presence of WNV and to track its spread in the community and across the United States; to screen for WNV in donated units of blood, tissues, or organs

When to Get Tested?

When you have symptoms suggesting WNV such as headache, fever, stiff neck, and muscular weakness and have been exposed to mosquitos or when you have had a diagnosis of encephalitis and/or meningitis associated with the summer season

Sample Required?

Cerebrospinal fluid collected from a spinal tap and/or a blood sample drawn from a vein in your arm

Test Preparation Needed?