ARUP's Laboratory Test Directory

Arbovirus Antibodies, IgG, Serum : 2001593

Mnemonic: ARBO SER G

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: 0.15 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:
Effective February 19, 2013
 
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.
1.30-1.49 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. 

CPT Code(s): 86651; 86652; 86653; 86654; 86789
Cross References: Encephalitis Antibodies (Arbovirus Antibodies, IgG, Serum)