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Test Code BLOD0682 Varicella-Zoster Screen (IgG)

Useful For

  • Determination of immune status of individuals to the Varicella-Zoster virus (VZV)

  • Documentation of previous infection with VZV in an individual without a previous record of immunization to VZV


Enzyme linked fluorescent assay (ELFA)

Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen Type: Serum

Container/Tube: Red top or gold top

Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL

Collection Instructions: Centrifuge and separate serum from cells within 2 hours of collection.  

Specimen Rejection:  Grossly hemolyzed, icteric or lipemic samples will be rejected. 


Specimen Transport Temperature

Ambient <8 hours/Refrigerated >8hours

Specimen Stability


Specimen Type Temperature Time
Serum Ambient 8 hours
  Refrigerated 5 days
  Frozen 30 days


Reference Values


Result Interpretation
<0.60 Negative Considered not immune to Varicella-Zoster virus infection
≥0.60 to <0.90 Equivocal Immune status should be further assessed
≥0.90 Positive Considered immune to Varicella-Zoster virus infection


Day(s) Test Set Up

Monday through Friday


Turnaround Time: Same day as performed

Test Classification and CPT Coding