ARUP's Laboratory Test Directory

Arbovirus Antibodies, IgG and IgM, Serum : 2001594

Mnemonic: ARBOSER GM

Methodology: Semi-Quantitative Indirect Fluorescent Antibody/Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Performed: Tue, Fri
Reported: 1-5 days
Specimen Required: Collect: Serum separator tube. Also acceptable: Plain red.

Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.2 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of acute specimens. Mark specimens plainly as "acute" or "convalescent."

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Contaminated, hemolyzed, or severely lipemic specimens.

Stability (collection to initiation of testing): After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)

Reference Interval:
 
Test Number Components Reference Interval
0050507St. Louis Encephalitis Antibody, IgG by IFA, Serum Less than 1:16
0050508California Encephalitis Antibody, IgG by IFA, Serum Less than 1:16
0050509Eastern Equine Encephalitis Antibody, IgG by IFA, Serum Less than 1:16
0050514Western Equine Encephalitis Antibody, IgG by IFA, Serum Less than 1:16
0050234West Nile Virus Antibody, IgG by ELISA, Serum 1.29 IV or less: Negative - No significant level of West Nile virus IgG antibody detected.
1.30-1.50 IV: Equivocal - Questionable presence of West Nile virus IgG antibody detected.  Repeat testing in 10-14 days may be helpful.
1.51 IV or greater: Positive - Presence of IgG antibody to West Nile virus detected, suggestive of current or past infection. 
0098732St. Louis Encephalitis Antibody, IgM by IFA, Serum Less than 1:16
0098731California Encephalitis Antibody, IgM by IFA, Serum Less than 1:16
0098733Eastern Equine Encephalitis Antibody, IgM by IFA, Serum Less than 1:16
0098734Western Equine Encephalitis Antibody, IgM by IFA, Serum Less than 1:16
0050236West Nile Virus Antibody, IgM by ELISA, Serum 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.
CPT Code(s): 86651 x2 Encephalitis, California (La Crosse); 86652 x2 Encephalitis, Eastern Equine; 86653 x2 Encephalitis, St. Louis; 86654 x2 Encephalitis, Western Equine; 86789 West Nile Virus IgG; 86788 West Nile Virus IgM
Cross References: Encephalitis Antibodies (Arbovirus Antibodies, IgG & IgM, Serum)
 
 

 

 

 
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