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Western Equine Encephalitis Virus (IgG, IgM) Antibody Panel, IFA
Test Code37311X
CPT Codes
86654 (x2)
Preferred Specimen
1 mL serum
Minimum Volume
0.1 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Grossly icteric
Methodology
Immunofluorescence Assay (IFA)
Setup Schedule
Sets up 5 days a week.
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.
Clinical Significance
IgG titers ≥1:16 suggest exposure (either past or recent), while the presence of IgM indicated recent infection.
