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.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|2005686||Japanese Encephalitis Virus Antibody IgM||63562-3|
- JE Virus IgM