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Vanderbilt Pathology Laboratory Services

Test Directory



V-Z ANTIGEN DETECTION - VESICULAR SPECIMENS (VZG)

Department: Virology
Test Synonym(s): VZG, Herpes zoster antigen, Direct Fluorescent Antigen (DFA) Varicella Zoster
Test Components: V-Z antigen, Herpes zoster antigen/stain
CPT Codes: 87290
Methodology: Direct Fluorescent Antigen
Reference Range: Negative, positive, invalid
Tube Type: Will accept material in syringe for DFA only but requires Virology Medical Director consult
Specimen: Cellular material in a small amount (1-2 mL) of universal (viral) transport medium (UTM) or sterile saline - specify source. No wooden shaft or calcium alginate tip swabs
Alternate Specimen: Will accept material in syringe but requires lab consult.
Volume: 1 - 2 mL UTM or sterile saline
Minimum Volume: 1 mL UTM or sterile saline
Temperature: Store refrigerated (2-8 C), do not freeze, transport on wet ice
Stability: Refrigerated (2-8 C); samples older than 24 hours will receive a comment.
Reasons for Rejection: Dry swab, Calcium alginate or wooden-shaft swab; slide preps accepted but discouraged.
Days Performed: Daily
Times Performed: Monday - Friday: 6:30 am to 11:00 pm, Saturday and Sunday: 7:00 am to 3:30 pm.
TAT: 1-3 hours
Special Instructions: Send to laboratory immediately on ice. No wooden/calcium alginate or dry swabs.

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