Ordering Recommendation

Not recommended as a stand-alone test. Refer to Arbovirus Antibodies, IgG and IgM, CSF (2001597).

Mnemonic
ARBO CSF M
Methodology

Semi-Quantitative Indirect Fluorescent Antibody/Semi-Quantitative Enzyme-Linked Immunosorbent Assay

Performed

Tue, Fri

Reported

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.
Specimen Required
Patient Preparation
Collect

CSF.

Specimen Preparation

Transfer 4 mL CSF to an ARUP Standard Transport Tube. (Min: 1.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Contaminated, heat-inactivated , or hemolyzed specimens.

Remarks
Stability

Ambient: 8 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)

Reference Interval
Components Reference Interval
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.

Interpretive Data



Compliance Category

Laboratory Developed Test (LDT)

Note
Hotline History
N/A
CPT Codes

86651; 86652; 86653; 86654; 86788

Components
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
* 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
Arbovirus Antibodies, IgM, CSF