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
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)
|St. Louis Encephalitis Antibody, IgM by IFA, CSF||Less than 1:1|
|California Encephalitis Antibody, IgM by IFA, CSF||Less than 1:1|
|Eastern Equine Encephalitis Antibody, IgM by IFA, CSF||Less than 1:1|
|Western Equine Encephalitis, Antibody, IgM by IFA, CSF||Less than 1:1|
|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||9540-6|
|0098899||St. Louis Encephalitis Ab, IgM, CSF||21510-3|