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🧪 What is Varicella Zoster IgG?

The Varicella Zoster Virus (VZV) IgG test detects IgG antibodies against VZV, the virus responsible for chickenpox and shingles. Presence of IgG indicates past infection or immunity due to vaccination or natural exposure.

❓ Why is the Test Done?

To:

Determine immunity status against varicella (chickenpox)
Assess susceptibility before vaccination or in pregnant women
Confirm past infection in individuals with unclear history
Evaluate immune status in immunocompromised patients

📊 Normal Range / Interpretation

Result	Interpretation
Negative	No detectable IgG; indicates susceptibility
Positive	Presence of IgG antibodies; indicates immunity

📈 Interpretation of Results

Result	Clinical Significance
Positive IgG	Immunity from past infection or vaccination
Negative IgG	Susceptible to varicella infection; vaccination recommended

🧠 Associated Conditions

Condition	Details
Chickenpox (Varicella)	Primary infection with VZV causing vesicular rash
Shingles (Herpes Zoster)	Reactivation of latent VZV in dorsal root ganglia
Immunosuppression	Risk of severe varicella; importance of immunity

🔄 Related / Follow-Up Tests

Varicella Zoster IgM – indicates recent or acute infection
PCR for VZV DNA – detects active infection in lesions
Clinical assessment – rash history and symptoms

✅ Fasting Required?

Test	Fasting Required
Varicella Zoster IgG	❌ No

📝 Summary Table

Parameter	Details
What	Detects IgG antibodies indicating immunity to VZV
Why	Assess past infection or immunity
Normal Result	Positive indicates immunity
Negative Result	Susceptible to infection
Associated Conditions	Chickenpox, shingles, immunosuppression
Follow-up Tests	IgM, PCR, clinical evaluation
Fasting Required	❌ No

Varicella Zooster IgG

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