Arbovirus Antibodies (IgG, IgM), IFA, Serum

Test Code

ARBGM

Alias/See Also

34980

CPT Codes
86651 (x2), 86652 (x2), 86653 (x2), 86654 (x2)

Includes

California Encephalitis (IgG, IgM), Eastern Equine Encephalitis (IgG, IgM), St. Louis Encephalitis (IgG, IgM), Western Equine Encephalitis (IgG, IgM)

Preferred Specimen

1 mL serum collected in a red-top tube (no gel)

Minimum Volume

0.2 mL

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Icteric • Lipemic samples

Methodology
Immunofluorescence Assay (IFA)

Setup Schedule

Monday-Friday Morning Report available: 3 Days after receipt at the performing laboratory. Add three (3) days for transport.

Limitations

False-positive results may be produced if the patient has been immunized against yellow fever or if the patient has had previous infections that produce similar, cross-reacting antibodies.

Reference Range

See individual tests

Clinical Significance

Serum is tested against antigens of California Encephalitis (La Crosse), Eastern Equine Encephalitis, St. Louis Encephalitis and Western Equine Encephalitis viruses. IgG titers >=1:16 suggest exposure, while the presence of IgM indicates recent infection. Incidence is seasonal from mid- to late-summer (July-October).

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

Last Updated: May 4, 2023

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.