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West Nile Virus Antibodies, IgG and IgM by ELISA, Serum
0050226
Ordering Recommendation

Detect presence of IgG and IgM antibodies in individuals with a clinical suspicion of West Nile Virus.

Mnemonic
WNILE SER
Methodology
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Performed
Sun, Tue, Fri
Reported
1-6 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
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
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, Serum1.29 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, Serum0.89 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 NameLOINC
0050234West Nile Virus Ab, IgG, Ser38997-3
0050236West Nile Virus Ab, IgM, Ser38166-5
* 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