West Nile Virus Antibodies, IgG and IgM by ELISA, Serum
0050226
Ordering Recommendation
Submit With Order
Mnemonic
WNILE SER
Methodology
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Performed
Tue, Fri
Reported
1-8 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Serum separator tube.  
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.15 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" or "convalescent."  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
Plasma. Contaminated, heat-inactivated, hemolyzed, or severely lipemic specimens.  
Remarks
 
Stability
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)  
Reference Interval
Test Number Components Reference Interval
0050234West 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-​1.49 IV: Equivocal -​ Questionable presence of West Nile virus IgG antibody detected. Repeat testing in 10-​14 days may be helpful.
1.50 IV or greater: Positive -​ Presence of IgG antibody to West Nile virus detected, suggestive of current or past infection.
0050236West 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.
Note
CPT Code(s)
86789; 86788
Components
Component Test Code*Component Chart Name
0050234West Nile Virus Ab, IgG, Ser
0050236West Nile Virus Ab, IgM, Ser
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Cross References
  • Arbovirus
  • Flavivirus
  • West Nile Virus Antibodies
  • WNV
  • WNV IgG and IgM