Arbovirus Antibodies, IgG, Serum
Ordering Recommendation

Not recommended as a stand-alone test. Refer to Arbovirus Antibodies, IgG and IgM, Serum (2001594).

Semi-Quantitative Indirect Fluorescent Antibody/Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Tue, Fri
1-5 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Serum separator tube. Also acceptable: Plain red. 
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 acute specimens. Mark specimens plainly as "acute" or "convalescent." 
Storage/Transport Temperature
Unacceptable Conditions
Contaminated, hemolyzed, or severely lipemic, specimens. 
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) 
Reference Interval
Effective February 19, 2013
ComponentsReference Interval
St. Louis Encephalitis Antibody, IgG by IFA, SerumLess than 1:16
California Encephalitis Antibody, IgG by IFA, SerumLess than 1:16
Eastern Equine Encephalitis Antibody, IgG by IFA, SerumLess than 1:16
Western Equine Encephalitis Antibody, IgG by IFA, SerumLess than 1:16
West 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.

Interpretive Data

Hotline History
View Hotline History
CPT Code(s)
86651; 86652; 86653; 86654; 86789
Component Test Code*Component Chart NameLOINC
0050234West Nile Virus Ab, IgG, Ser38997-3
0050507St. Louis Encephalitis Ab, IgG, Serum10906-6
0050508Calif Encephalitis Antibody IgG10904-1
0050509Eastern Equine Enceph Ab, IgG10896-9
0050514Western Equine Enceph Ab, IgG, Serum6957-5
* 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.
  • Encephalitis Antibodies