West Nile Virus Antibodies, IgG and IgM by ELISA, Serum
0050226
Ordering Recommendation
 
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.
Submit With Order
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.
Aliases
  • Arbovirus
  • Flavivirus
  • West Nile Virus Antibodies
  • WNV
  • WNV IgG and IgM