West Nile Virus (RNA Detection) Qualitative Test
Short Name: WNV RNA Qualitative
Also known as: WNV RNA PCR, West Nile Virus Qualitative PCR, WNV RT-PCR
West Nile Virus (RNA Detection) Qualitative Test test available at DNA Labs India for ₹7,225. Uses Reverse Transcription Polymerase Chain Reaction (RT-PCR) on Serum, Plasma, Whole Blood, CSF samples. Results in Reports are available on the 3rd working day after sample collection. Email reports within 36 hours of release, phone support 24 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 purpose of the West Nile Virus (RNA Detection) Qualitative Test is to detect the presence of West Nile Virus RNA in a patient's blood or cerebrospinal fluid using RT-PCR. This test aids in the early diagnosis of acute WNV infection, especially in patients presenting with symptoms consistent with WNV disease, such as fever, headache, and neurological signs. Early detection is crucial for appropriate clinical management, infection control, and epidemiological surveillance.
- Test Code
- 6254
- CPT Code
- 87798
- ICD Code
- A92.3
- Price
- ₹7,225
- Sample Type
- Serum, Plasma, Whole Blood, CSF
- Result Time
- Reports are available on the 3rd working day after sample collection. Email reports within 36 hours of release, phone support 24 hours.
- Fasting Required
- No
- Method
- Reverse Transcription Polymerase Chain Reaction (RT-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 recent blood transfusions.
Method: Venipuncture or Lumbar Puncture (CSF)
Laboratory Analysis
Blood sample will be collected by venipuncture. For CSF, a lumbar puncture will be performed by a qualified healthcare professional. Ensure proper aseptic technique is followed.
Report Delivery
No specific precautions are needed after blood collection. If CSF was collected, follow the physician's advice regarding rest and hydration. The sample will be transported to the laboratory immediately.
Timeline: Reports are available on the 3rd working day after sample collection. Email reports within 36 hours of release, phone support 24 hours.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of the West Nile Virus (RNA Detection) Qualitative Test is to detect the presence of West Nile Virus RNA in a patient's blood or cerebrospinal fluid using RT-PCR. This test aids in the early diagnosis of acute WNV infection, especially in patients presenting with symptoms consistent with WNV disease, such as fever, headache, and neurological signs. Early detection is crucial for appropriate clinical management, infection control, and epidemiological surveillance.
How to Prepare
- Use sterile collection tubes: plain red top for serum, EDTA for plasma/whole blood, and sterile container for CSF
- Label the sample with patient's name, date, and time of collection
- Transport the sample to the laboratory immediately; if delayed, store at 2-8°C for up to 24 hours
- For CSF, collect at least 1 mL in a sterile tube and transport at 2-8°C
Doctor's Notes
Reviewed by Dr Kothari Ramesh Shantilal — MBBS, MD (Microbiology) · Reg. No. 27670
"Early detection of West Nile Virus RNA is critical for timely management, especially in endemic areas. This qualitative RT-PCR test offers high sensitivity and specificity, aiding in accurate diagnosis of acute infection."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or lipemic samples
- Improperly labeled samples
- Samples received in inappropriate containers
- Samples with insufficient volume
- Samples not stored or transported under recommended conditions
Understanding Your Results
Detected
WNV RNA is present, indicating acute WNV infection. Clinical correlation is required.
Action: Initiate supportive care and monitor for neurological complications. Consider serological testing for IgM/IgG to confirm.
Not Detected
No WNV RNA detected. This may be due to absence of infection or sample collection outside the viremic window.
Action: If clinical suspicion remains, consider repeat testing or serological testing for antibodies.
Consult a healthcare provider immediately if you experience symptoms such as high fever, severe headache, neck stiffness, confusion, seizures, or paralysis, especially after mosquito exposure or travel to endemic areas. Early diagnosis and management are crucial.
Limitations
- ⚠This is a qualitative test and does not provide viral load quantification
- ⚠A negative result does not rule out WNV infection; serological testing may be needed if clinical suspicion remains
- ⚠The test is most sensitive during the first 8 days after symptom onset; after this period, viral RNA may be undetectable
- ⚠Results should be interpreted in conjunction with clinical findings and exposure history
Risks & Considerations
- ●Blood collection: minor bruising, bleeding, or infection at puncture site
- ●Lumbar puncture: headache, back pain, or rare risk of infection or bleeding
Interfering Factors
- ●Sample collection during the very early or late phase of infection may yield false negatives due to low viral load
- ●Improper sample handling or storage can degrade RNA, leading to false-negative results
- ●Cross-contamination during sample processing can cause false positives
- ●Presence of PCR inhibitors in the sample (e.g., hemoglobin, heparin) may interfere with amplification
Compare With Similar Tests
| Test | West Nile Virus (RNA Detection) Qualitative Test | WNV IgM Antibody Test | WNV IgG Antibody Test | Viral Culture |
|---|---|---|---|---|
| Comparison | West Nile Virus (RNA Detection) Qualitative Test |
Frequently Asked Questions
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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.
Your Data Privacy
Your medical data is protected under Indian law.
✓ Stored in India: All patient records are stored on servers located in India. No data is transferred outside the country.
✓ DPDP Act Compliant: Under the Digital Personal Data Protection Act 2023, you can request deletion of your records at any time by contacting support.
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