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Fluorescent Immunoassay for Antibodies to Varicella-Zoster Virus (IgG)

Published: August 9, 2026Updated: August 16, 2026

This test measures the presence of antibodies against the varicella-zoster virus (chickenpox/shingles) in your blood. It helps determine if you’ve had the infection or received vaccination.

Quick summary

["Checks past exposure to chickenpox or shingles virus through antibodies."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
17012-6
Short code
FLUAV Ab CSF-aCnc
Synonyms
FLUAV Ab CSF-aCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What This Test Measures

The test detects IgG antibodies, which develop after an infection or vaccination. These antibodies indicate your immune system has recognized the virus and created a memory response.

Why It’s Ordered

Doctors may order this test to confirm past exposure to varicella-zoster virus in individuals with suspected shingles, chickenpox history, or for pre-vaccination screening (e.g., healthcare workers).

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein, usually in your arm. The process takes a few minutes.

What the Results Mean

Positive results suggest you’ve had the virus or received vaccination. Negative results mean no detectable antibodies, indicating either no prior exposure or recent infection.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Varicella-Zoster IgG Antibody (FIA)

Frequently asked questions

Why did my doctor order this test?
Your doctor may have suspected past exposure to chickenpox or shingles, reviewed vaccination history, or checked immunity before exposure to the virus.
What does a positive result mean?
A positive result means your immune system has recognized the virus, either through prior infection or vaccination. It does not indicate active illness but confirms immunity.
Can this test detect active shingles?
No, this test only measures antibodies for past exposure. For active shingles, a different test (like varicella-zoster virus PCR or culture) would be needed.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy