ARUP's Laboratory Test Directory

Arbovirus Antibodies, IgM, CSF : 2001595

Mnemonic: ARBO CSF M

Methodology: Semi-Quantitative Indirect Fluorescent Antibody/Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Performed: Tue, Fri
Reported: 1-5 days
Specimen Required: 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.

Stability (collection to initiation of testing): Ambient: 8 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Reference Interval:
Test Number Components Reference Interval
0098899St. Louis Encephalitis Antibody, IgM by IFA, CSF Less than 1:1
0098898California Encephalitis Antibody, IgM by IFA, CSF Less than 1:1
0098729Eastern Equine Encephalitis Antibody, IgM by IFA, CSF Less than 1:1
0098730Western Equine Encephalitis, Antibody, IgM by IFA, CSF Less than 1:1
0050239West 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:

See Compliance Statement B: www.aruplab.com/CS
CPT Code(s): 86651; 86652; 86653; 86654; 86788