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West Nile Virus Antibody, CSF

Item Value
Available Stat? No
Test code WNVC
Test group WNV
Performed by Quest
Sendout? Yes
Method ELISA
Container type CSF tube or sterile collection tube
Amount to Collect 2 mL CSF
Sample type CSF
Preferred volume 2 mL CSF
Min. Volume 0.7 mL CSF
Processing notes Order Quest test #36597N, freeze CSF at -20C.
Units Index
Normal range West Nile Virus IgG, CSF:
Negative <1.30
Equivocal 1.30-1.49
Positive ≥1.50

West Nile Virus IgM, CSF:
Negative <0.90
Equivocal 0.90-1.10
Positive >1.10
Synonyms WNV
Stability Room temperature 4 days, refrigerated 1 week, frozen @ -20C 1 month, frozen @ -70C indefinite
Turn around times Test set up 3 days a week at night, reports in 5-7 days.
Reflex? See 'Additional information'
Additional information West Nile Virus (WNV) IgM antibodies, in blood or CSF, are positive in most infected people within 8 days of onset of symptoms and may remain detectable for months. In our laboratory, CSF samples with reactive IgM are rerun in a modified test to rule out nonspecific reactions. IgG antibodies indicate either current or past exposure to the virus.
CPT coding 86788-90, 86789-90
Last Updated 6/14/2016 3:35:09 PM
Entry Number 1337
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