West Nile Virus Antibodies, IgG & IgM by ELISA, Serum : ARUP Lab Tests

Testing Information

ARUP's Laboratory Test Directory

West Nile Virus Antibodies, IgG & IgM by ELISA, Serum : 0050226

Mnemonic: WNILE SER

Methodology:	Enzyme-Linked Immunosorbent Assay
Performed:	Tue, Fri
Reported:	1-8 days
Specimen Required:	Collect: One 4 mL serum separator tube. Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.15 mL serum at 2-8°C. Remarks: Separate serum from cells ASAP. Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" or "convalescent." Unacceptable Conditions: Plasma. Hemolyzed, severely lipemic, heat-inactivated, or contaminated specimens. Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)

Reference Interval:

Test Number	Components	Reference Interval
0050234	West Nile Virus Antibody, IgG by ELISA, Serum	1.29 IV or less: Negative - No significant level of West Nile virus IgG antibody detected. 1.30-1.50 IV: Equivocal - Questionable presence of West Nile virus IgG antibody detected. Repeat testing in 10-14 days may be helpful. 1.51 IV or greater: Positive - Presence of IgG antibody to West Nile virus detected, suggestive of current or past infection.
0050236	West Nile Virus Antibody, IgM by ELISA, Serum	0.89 IV or less: Negative - No significant level of West Nile virus IgM antibody detected. 0.90-1.10 IV: Equivocal - Questionable presence of West Nile virus IgM antibody detected. Repeat testing in 10-14 days may be helpful. 1.11 IV or greater: Positive - Presence of IgM antibody to West Nile virus detected, suggestive of current or recent infection.

Interpretive Data:

Refer to individual components for additional interpretive data.

CPT Code(s):

86789 WNV IgG, 86788 WNV IgM