VZ IgG by IFA (VZ2)

Department: Virology
Test Synonym(s): LAB3477, V-Z titer, VZ2, VZV IgG, quantitative
CPT Codes: 86317
Methodology: IFA titer
Reference Range: Unvaccinated <1:8 Vaccinated 1:8 or greater
Tube Type: Gold top SST (Clot activator with gel) or Red top (no gel)
Specimen: Serum only
Alternate Specimen: None
Pediatric Requirements: Red top microtainer (1 mL)
Volume: 1 tube
Minimum Volume: Red top microtainer (1 mL)
Temperature: Allow to clot, store refrigerated (2-8 degreesC)
Stability: Labile specimen. Keep refrigerated.
Reasons for Rejection: Same assay within 4 days, gross contamination, hemolysis, lipemia, icterus
Days Performed: Tuesday and Friday
Times Performed: Morning
TAT: Same day, 72 hours up to 1 week.
Special Instructions: Specimen is serially diluted and tested for antibodies. Results reported as highest dilution of specimen that still shows detectable antibody reactivity. If performed to confirm negative or equivocal EIA result, limited IFA assessment is performed.

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