ARUP's Laboratory Test Directory

Arbovirus Antibodies, IgG and IgM, CSF : 2001597

Mnemonic: ARBOCSF GM

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: 2.5 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:
Effective February 19, 2013
Test Number Components Reference Interval
0098895St. Louis Encephalitis Antibody, IgG by IFA, CSF Less than 1:1
0098893California Encephalitis Antibody, IgG by IFA, CSF Less than 1:1
0098896Eastern Equine Encephalitis Antibody, IgG by IFA, CSF Less than 1:1
0098897Western Equine Encephalitis Antibody, IgG by IFA, CSF Less than 1:1
0050238West Nile Virus Antibody, IgG by ELISA, CSF 1.29 IV or less: Negative - No significant level of West Nile virus IgG antibody detected.
1.30-1.49 IV: Equivocal - Questionable presence of West Nile virus IgG antibody detected. Repeat testing in 10-14 days may be helpful.
1.50 IV or greater: Positive - Presence of IgG antibody to West Nile virus detected, suggestive of current or past infection.
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: Refer to individual components.

See Compliance Statement B: www.aruplab.com/CS
CPT Code(s): 86651 x2; 86652 x2; 86653 x2; 86654 x2; 86789; 86788
Cross References: Arbovirus (Arbovirus Antibodies, IgG & IgM, CSF), Viral Encephalitis (Arbovirus Antibodies, IgG & IgM, CSF)