Not recommended as a stand-alone test. Refer to Arbovirus Antibodies, IgG and IgM, CSF (2001597).
Semi-Quantitative Indirect Fluorescent Antibody/Semi-Quantitative Enzyme-Linked Immunosorbent Assay
New York DOH Approval Status
Transfer 4 mL CSF to an ARUP Standard Transport Tube. (Min: 1.5 mL)
Contaminated, heat-inactivated , or hemolyzed specimens.
Ambient: 8 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
|West Nile Virus Antibody IgM CSF||0.89 IV or less|
|Eastern Equine Enceph Ab, IgM, CSF||Less than 1:1|
|Western Equine Enceph Ab, IgM, CSF||Less than 1:1|
|California Encephalitis IgM CSF||Less than 1:1|
|St. Louis Encephalitis Ab, IgM, CSF||Less than 1:1|
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.
|West Nile Virus Antibody, IgM by ELISA, CSF||0.89 IV or less: Negative - No significant level of West Nile virus IgM antibody detected.
0.90-1.10 IV: Equivocal - Questionable presence of West Nile virus IgM antibody detected. Repeat testing in 10-14 days may be helpful.
1.11 IV or greater: Positive - Presence of IgM antibody to West Nile virus detected, suggestive of current or recent infection.
Laboratory Developed Test (LDT)
86651; 86652; 86653; 86654; 86788
|Component Test Code*||Component Chart Name||LOINC|
|0050239||West Nile Virus Antibody IgM CSF||39573-1|
|0098729||Eastern Equine Enceph Ab, IgM, CSF||10899-3|
|0098730||Western Equine Enceph Ab, IgM, CSF||9316-1|
|0098898||California Encephalitis IgM CSF||49139-9|
|0098899||St. Louis Encephalitis Ab, IgM, CSF||21510-3|