Arbovirus Antibodies, IgM, CSF
Ordering Recommendation

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
Tue, Fri
1-5 days
New York DOH Approval Status
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Specimen Preparation
Transfer 4 mL CSF to an ARUP Standard Transport Tube. (Min: 1.5 mL) 
Storage/Transport Temperature
Unacceptable Conditions
Contaminated, heat-inactivated , or hemolyzed specimens. 
Ambient: 8 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) 
Reference Interval
ComponentsReference Interval
St. Louis Encephalitis Antibody, IgM by IFA, CSFLess than 1:1
California Encephalitis Antibody, IgM by IFA, CSFLess than 1:1
Eastern Equine Encephalitis Antibody, IgM by IFA, CSFLess than 1:1
Western Equine Encephalitis, Antibody, IgM by IFA, CSFLess than 1:1
West Nile Virus Antibody, IgM by ELISA, CSF0.89 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.

Interpretive Data

Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Hotline History
View Hotline History
CPT Code(s)
86651; 86652; 86653; 86654; 86788
Component Test Code*Component Chart NameLOINC
0050239West Nile Virus Antibody IgM CSF39573-1
0098729Eastern Equine Enceph Ab, IgM, CSF10899-3
0098730Western Equine Enceph Ab, IgM, CSF9316-1
0098898California Encephalitis IgM CSF9540-6
0098899St. Louis Encephalitis Ab, IgM, CSF21510-3
* 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.