Japanese Encephalitis Virus Antibody, IgG by ELISA
Ordering Recommendation
Submit With Order
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
1-8 days
New York DOH Approval Status
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
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.

See Compliance Statement D: www.aruplab.com/CS
CPT Code(s)
Component Test Code*Component Chart Name
2005688Japanese Encephalitis Virus Antibody IgG
* 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
  • JE Virus IgG