Not recommended as a stand-alone test. Japanese Encephalitis Virus Antibodies, IgG and IgM by ELISA (2005689) is preferred.
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Serum separator tube
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)
Contaminated or heat-inactivated specimens
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 6 months (avoid repeated freeze/thaw cycles)
Effective January 17, 2012
|Japanese Encephalitis Virus Antibody, IgM by ELISA
|3.9 IV or less||Negative - No significant level of detectable Japanese encephalitis virus (JEV) IgM antibody.|
|4.0 -6.0 IV||Equivocal - Questionable presence of JEV IgM antibody. Repeat testing in 10-14 days may be helpful.|
|6.1 IV or greater||Positive - JEV IgM antibody detected, which may indicate a current or recent infection. A low IgM antibody level may occasionally persist for more than 12 months post-infection.|
A positive result (6.1 IV or greater) indicates the presence of IgM antibody to a flavivirus in the Japanese encephalitis serogroup or the dengue virus serogroup. 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.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|2005686||Japanese Encephalitis Virus Antibody IgM||63562-3|
- JE Virus IgM