JEV Viral Load Quantitative Test
Short Name: JEV Viral Load
Also known as: Japanese Encephalitis Virus PCR, JEV RNA Quantitative Test
JEV Viral Load Quantitative Test test available at DNA Labs India for ₹9,350. Uses Real Time PCR on Whole Blood, Serum, Plasma, C.S.F samples. Results in Reports are typically available on the 3rd working day after sample collection. You will receive an email and WhatsApp notification once the report is ready.. 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 JEV Viral Load Quantitative Test is to detect the presence of Japanese Encephalitis Virus in the body and quantify the viral load. This information is crucial for confirming the diagnosis of Japanese Encephalitis, especially in patients with acute encephalitis syndrome. Quantitative measurement helps in monitoring the progression of the infection, evaluating the effectiveness of antiviral therapy, and assessing the risk of severe neurological complications. In endemic regions, early diagnosis through viral load testing can aid in implementing public health measures to control outbreaks. Additionally, the test is valuable for research purposes and epidemiological surveillance.
- Test Code
- 6168
- CPT Code
- 87562
- ICD Code
- A83.0
- Price
- ₹9,350
- Sample Type
- Whole Blood, Serum, Plasma, C.S.F
- Result Time
- Reports are typically available on the 3rd working day after sample collection. You will receive an email and WhatsApp notification once the report is ready.
- Fasting Required
- No
- Method
- Real Time PCR
Sample Collection
No special preparation is required. However, patients must sign a consent document and provide relevant clinical history. Inform your healthcare provider about any medications or supplements you are taking.
Method: Venipuncture / Lumbar puncture
Laboratory Analysis
Blood sample will be collected by a trained phlebotomist using sterile technique. For CSF collection, a lumbar puncture will be performed by a physician in a clinical setting.
Report Delivery
No specific aftercare is needed. You may resume normal activities immediately. The sample will be transported to the laboratory under controlled conditions.
Timeline: Reports are typically available on the 3rd working day after sample collection. You will receive an email and WhatsApp notification once the report is ready.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of the JEV Viral Load Quantitative Test is to detect the presence of Japanese Encephalitis Virus in the body and quantify the viral load. This information is crucial for confirming the diagnosis of Japanese Encephalitis, especially in patients with acute encephalitis syndrome. Quantitative measurement helps in monitoring the progression of the infection, evaluating the effectiveness of antiviral therapy, and assessing the risk of severe neurological complications. In endemic regions, early diagnosis through viral load testing can aid in implementing public health measures to control outbreaks. Additionally, the test is valuable for research purposes and epidemiological surveillance.
How to Prepare
- Ensure the patient has signed the consent form.
- Collect blood in an EDTA vacutainer (2 mL) for plasma separation.
- For CSF, collect 1-2 mL in a sterile container.
- Label the sample with patient ID and collection time.
- Transport the sample to the laboratory at 2-8°C within 24 hours.
- Avoid repeated freeze-thaw cycles.
Doctor's Notes
Reviewed by Dr Kothari Ramesh Shantilal — MBBS, MD (Microbiology) · Reg. No. 27670
"Early quantification of JEV viral load is critical for prognosis and monitoring of Japanese Encephalitis, especially in endemic regions. Timely diagnosis can significantly reduce mortality and neurological sequelae."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or lipemic samples
- Insufficient sample volume
- Improperly labeled samples
- Samples received after prolonged delay without proper storage
Understanding Your Results
Positive
Active JEV infection. Viral load may guide prognosis and treatment decisions.
Negative
No JEV RNA detected. However, if clinical suspicion is high, consider repeat testing or alternative diagnostics.
Consult a physician immediately if you experience symptoms such as high fever, severe headache, neck stiffness, confusion, or seizures, especially after mosquito exposure in endemic areas. Early medical evaluation is critical.
Limitations
- ⚠A negative result does not completely rule out JEV infection; clinical correlation is essential.
- ⚠Viral load may not correlate directly with disease severity in all patients.
- ⚠The test should be performed within the recommended window (5-15 days post symptom onset) for optimal sensitivity.
- ⚠Results should be interpreted by a qualified physician in the context of clinical findings and other laboratory tests.
Risks & Considerations
- ●Minimal risk of bruising or bleeding at the venipuncture site
- ●Rare risk of infection at the puncture site
- ●For lumbar puncture: headache, back pain, or rarely infection
Interfering Factors
- ●Improper sample collection or storage leading to RNA degradation
- ●Presence of PCR inhibitors in the sample (e.g., hemoglobin, heparin)
- ●Cross-contamination during sample processing
- ●Testing during the very early or very late stages of infection when viral load may be below detection limit
Compare With Similar Tests
| Test | JEV Viral Load Quantitative Test | JEV IgM Capture ELISA | JEV IgG ELISA | JEV RT-PCR (Qualitative) |
|---|---|---|---|---|
| Comparison | JEV Viral Load Quantitative Test | Detects antibodies, not the virus. Useful in later stages. Less sensitive in early infection. | Indicates past infection or vaccination. Not useful for acute diagnosis. | Detects presence but not quantity. Less informative for monitoring. |
Frequently Asked Questions
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