Page "West Nile virus" Paragraph 41

Four FDA-cleared WNV IgM ELISA kits are commercially available from different manufacturers in the U. S., each of these kits is indicated for use on serum to aid in the presumptive laboratory diagnosis of WNV infection in patients with clinical symptoms of meningitis or encephalitis.

Positive WNV test kits obtained via use of these kits should be confirmed by additional testing at a state health department laboratory or CDC.