VZV (Varicella Zoster Virus) Viral Load Quantitative Test
Short Name: VZV Viral Load
Also known as: VZV PCR, Varicella Zoster Virus Quantitative PCR, VZV DNA Quantification
VZV (Varicella Zoster Virus) Viral Load Quantitative Test test available at DNA Labs India for ₹7,650. Uses Real Time PCR on Serum, Plasma, Whole blood, Saliva, CSF, Swabs (vesicle, papule, crust), Crusts, Lymph node biopsy samples. Results in Reports are available on the 4th working day after sample collection. Email reports are sent within 48 hours, and phone reports within 36 hours.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Kothari Ramesh Shantilal
Consultant Microbiologist · Reg: 27670
Last reviewed: September 7, 2026
Overview
The primary purpose of the VZV viral load quantitative test is to confirm active VZV infection, differentiate between primary infection (chickenpox) and reactivation (shingles), and monitor the effectiveness of antiviral treatment. It is particularly valuable in immunocompromised patients, pregnant women, and neonates where clinical diagnosis may be uncertain. Quantitative measurement of viral DNA helps assess disease severity, predict complications, and guide therapeutic interventions. The test can also be used to detect VZV in cerebrospinal fluid in cases of neurological involvement such as meningitis or encephalitis.
- Test Code
- 6250
- CPT Code
- 87529
- ICD Code
- B01.9
- Price
- ₹7,650
- Sample Type
- Serum, Plasma, Whole blood, Saliva, CSF, Swabs (vesicle, papule, crust), Crusts, Lymph node biopsy
- Result Time
- Reports are available on the 4th working day after sample collection. Email reports are sent within 48 hours, and phone reports within 36 hours.
- Fasting Required
- No
- Method
- Real Time PCR
Sample Collection
No special preparation is required. However, patients should inform the healthcare provider about any antiviral medications they are taking, as this may affect the test results. A signed consent document is required.
Method: Venipuncture or swab collection
Laboratory Analysis
Blood sample is drawn from a vein in the arm. For swab samples, a sterile swab is rubbed over the lesion (vesicle, papule, or crust) to collect cells. CSF collection is performed by a healthcare professional via lumbar puncture.
Report Delivery
The sample is labeled and sent to the laboratory immediately. Patients can resume normal activities. Results are typically available within 4 working days.
Timeline: Reports are available on the 4th working day after sample collection. Email reports are sent within 48 hours, and phone reports within 36 hours.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of the VZV viral load quantitative test is to confirm active VZV infection, differentiate between primary infection (chickenpox) and reactivation (shingles), and monitor the effectiveness of antiviral treatment. It is particularly valuable in immunocompromised patients, pregnant women, and neonates where clinical diagnosis may be uncertain. Quantitative measurement of viral DNA helps assess disease severity, predict complications, and guide therapeutic interventions. The test can also be used to detect VZV in cerebrospinal fluid in cases of neurological involvement such as meningitis or encephalitis.
How to Prepare
- Blood: Collect in EDTA tube, mix gently
- Swabs: Use sterile swab, place in viral transport medium
- CSF: Collect in sterile tube, transport at 2-8°C
- Label all samples with patient ID and collection time
Doctor's Notes
Reviewed by Dr Kothari Ramesh Shantilal — MBBS, MD (Microbiology) · Reg. No. 27670
"Quantitative VZV PCR is essential for monitoring viral load in immunocompromised patients and assessing response to antiviral therapy. Early detection can prevent severe complications."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or clotted blood samples
- Insufficient sample volume
- Samples not stored at appropriate temperature
- Unlabeled or mislabeled samples
Understanding Your Results
Not detected
No VZV DNA found. Active infection unlikely, but clinical correlation is advised.
Low viral load (< 1000 copies/mL)
Indicates active infection, possibly early or mild. Antiviral therapy may be considered.
Moderate viral load (1000-10,000 copies/mL)
Active viral replication. Close monitoring and antiviral treatment recommended.
High viral load (> 10,000 copies/mL)
High level of viral replication, often seen in severe or disseminated disease. Urgent antiviral therapy and supportive care needed.
Consult your healthcare provider if you experience symptoms such as a painful blistering rash, fever, headache, or sensitivity to light, especially if you are immunocompromised, pregnant, or elderly. Early diagnosis and treatment can prevent complications.
Limitations
- ⚠A negative result does not completely rule out VZV infection, especially if sample is collected late in the disease course
- ⚠Quantitative results should be interpreted in conjunction with clinical findings
- ⚠Test may not distinguish between latent and active infection in some cases
- ⚠Requires specialized laboratory equipment and trained personnel
Risks & Considerations
- ●Minimal risk of bleeding or bruising at the blood draw site
- ●Slight discomfort during swab collection
- ●Rare risk of infection at the puncture site
Interfering Factors
- ●Improper sample collection or storage may degrade viral DNA
- ●Presence of PCR inhibitors in the sample (e.g., heparin, hemoglobin)
- ●Cross-contamination during sample processing
- ●Recent antiviral therapy may reduce viral load, leading to false negatives
Compare With Similar Tests
| Test | VZV (Varicella Zoster Virus) Viral Load Quantitative Test | VZV IgG Antibody Test | VZV IgM Antibody Test | VZV Direct Fluorescent Antibody (DFA) |
|---|---|---|---|---|
| Comparison | VZV (Varicella Zoster Virus) Viral Load Quantitative Test |
Frequently Asked Questions
What is the cost of the VZV viral load quantitative test?
What sample is required for the VZV viral load test?
Do I need to fast before the test?
How long does it take to get the results?
Is home sample collection available?
What does a positive VZV viral load result mean?
Can this test be used to monitor antiviral treatment?
Is the test covered by insurance?
What is the difference between VZV IgG and viral load test?
Are there any risks associated with the test?
Can the test be done on a child?
What should I do if my result is positive?
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We serve as a reference laboratory for hospitals and clinics across India. Send samples from your facility with same-day pickup, priority processing, and results delivered through our online portal. Competitive institutional pricing available.
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