Ordering Recommendation

Not recommended as a stand-alone test. Japanese Encephalitis Virus Antibodies, IgG and IgM by ELISA (2005689) is preferred.

Mnemonic
JPN M
Methodology

Semi-Quantitative Enzyme-Linked Immunosorbent Assay

Performed

Thu

Reported

1-8 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

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

Refrigerated

Unacceptable Conditions

Contaminated or heat-inactivated specimens

Remarks
Stability

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, 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.

Interpretive Data

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.

Compliance Category

Laboratory Developed Test (LDT)

Note
Hotline History
N/A
CPT Codes

86790

Components
Component Test Code* Component Chart Name LOINC
2005686 Japanese Encephalitis Virus Antibody IgM 63562-3
* 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.
Aliases
  • JE Virus IgM
Japanese Encephalitis Virus Antibody, IgM by ELISA