Japanese Encephalitis Virus Antibody, IgG by ELISA
Ordering Recommendation
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
1-8 days  
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Serum separator tube  
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 0.5 mL serum to an ARUP Standard Transport Tube. (Min: 0.15 mL)  
Storage/Transport Temperature
Unacceptable Conditions
Contaminated or heat-inactivated specimens.  
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 6 months (avoid repeated freeze/thaw cycles).  
Reference Interval
Effective January 17, 2012
Japanese Encephalitis Virus Antibody IgG
1.9 IV or less Negative -​ No significant level of detectable Japanese encephalitis virus (JEV) IgG antibody.
2.0 -​ 4.9 IV Equivocal -​ Questionable presence of JEV IgG antibody. Repeat testing in 10-​14 days may be helpful.
5.0 IV or greater Positive -​ JEV IgG antibody detected, which may indicate a current or past infection.
Interpretive Data
A positive result does not necessarily rule out infection with a different Flavivirus spp. Patients in the early stage of JEV infection may not have a detectable level of IgG antibody; IgG response may take several days or weeks to develop. In the absence of detectable IgG, testing for IgM-class antibody is strongly recommended. The best evidence of current infection is a significant change on two appropriately timed specimens with both tests performed in the same laboratory at the same time.

Compliance Statement D: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
CPT Code(s)
Component Test Code*Component Chart NameLOINC
2005688Japanese Encephalitis Virus Antibody IgG7934-3
* 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.
  • JE Virus IgG