Influenza A Viral Load Quantitative Test
Short Name: Influenza A Viral Load
Also known as: Influenza A PCR, Flu A Viral Load, Influenza A Quantitative PCR
Influenza A Viral Load Quantitative Test test available at DNA Labs India for ₹5,100. Uses Real Time PCR on Nasopharyngeal swab, throat swab, nasal swab, bronchial aspirate samples. Results in Reports are typically available by the 3rd working day after sample collection. Email reports are sent within 36 hours of result availability, and phone reporting is available within 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 primary purpose of the Influenza A Viral Load Quantitative Test is to detect and measure the amount of Influenza A virus in a patient's respiratory sample. This test is used to confirm active infection, assess the severity of the disease, monitor the effectiveness of antiviral therapy, and guide clinical management. Unlike qualitative tests that only indicate presence or absence, the quantitative result helps clinicians determine the viral burden, which correlates with disease severity and infectivity. This is particularly important for patients who are critically ill, immunocompromised, or those who do not respond to initial treatment. Additionally, the test can be used for epidemiological surveillance and outbreak investigations. By providing a numerical viral load, the test enables healthcare providers to make informed decisions about hospitalization, isolation, and the use of antiviral medications such as oseltamivir. It also aids in differentiating Influenza A from other respiratory infections with similar symptoms, ensuring appropriate and timely treatment.
- Test Code
- 6163
- CPT Code
- 87502
- ICD Code
- J10.1
- Price
- ₹5,100
- Sample Type
- Nasopharyngeal swab, throat swab, nasal swab, bronchial aspirate
- Result Time
- Reports are typically available by the 3rd working day after sample collection. Email reports are sent within 36 hours of result availability, and phone reporting is available within 24 hours.
- Fasting Required
- No
- Method
- Real Time PCR
Sample Collection
No special preparation is required. Patients should inform their healthcare provider about any medications they are taking, especially antiviral drugs. A consent form must be signed before sample collection.
Method: Swab or aspirate
Laboratory Analysis
The sample is collected by inserting a sterile swab into the nostril or throat, or by aspirating respiratory secretions. The procedure may cause mild discomfort but is generally well-tolerated.
Report Delivery
No specific aftercare is required. Patients can resume normal activities immediately. The sample is sent to the laboratory for analysis.
Timeline: Reports are typically available by the 3rd working day after sample collection. Email reports are sent within 36 hours of result availability, and phone reporting is available within 24 hours.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of the Influenza A Viral Load Quantitative Test is to detect and measure the amount of Influenza A virus in a patient's respiratory sample. This test is used to confirm active infection, assess the severity of the disease, monitor the effectiveness of antiviral therapy, and guide clinical management. Unlike qualitative tests that only indicate presence or absence, the quantitative result helps clinicians determine the viral burden, which correlates with disease severity and infectivity. This is particularly important for patients who are critically ill, immunocompromised, or those who do not respond to initial treatment. Additionally, the test can be used for epidemiological surveillance and outbreak investigations. By providing a numerical viral load, the test enables healthcare providers to make informed decisions about hospitalization, isolation, and the use of antiviral medications such as oseltamivir. It also aids in differentiating Influenza A from other respiratory infections with similar symptoms, ensuring appropriate and timely treatment.
How to Prepare
- Use a flocked swab for nasopharyngeal collection.
- Insert the swab into the nostril parallel to the palate and leave in place for a few seconds to absorb secretions.
- Place the swab into a viral transport medium tube and break the shaft at the scored line.
- Label the tube with patient identification and collection date/time.
- Transport the sample to the laboratory at 2-8°C or frozen if delayed.
Doctor's Notes
Reviewed by Dr Kothari Ramesh Shantilal — MBBS, MD (Microbiology) · Reg. No. 27670
"Quantitative viral load testing is essential for monitoring severe influenza A infections, especially in immunocompromised patients, to guide antiviral therapy and assess treatment response."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Sample not collected in appropriate viral transport medium.
- Sample with insufficient quantity or poor quality (e.g., no epithelial cells).
- Sample leaking or damaged during transport.
- Sample not labeled correctly or missing patient information.
- Sample received after prolonged delay without proper storage.
Understanding Your Results
Not detected
No Influenza A virus RNA was found. This suggests no active infection, but clinical correlation is needed as false negatives can occur.
Detected (low viral load, e.g., <10,000 copies/mL)
Indicates active infection with low viral burden. May be seen in early or resolving infection. Antiviral therapy may still be considered based on symptoms.
Detected (moderate viral load, e.g., 10,000-100,000 copies/mL)
Active infection with moderate viral load. Likely to be associated with significant symptoms. Antiviral treatment is recommended, especially in high-risk patients.
Detected (high viral load, e.g., >100,000 copies/mL)
High viral burden indicates severe infection. Patients may require hospitalization and aggressive antiviral therapy. Close monitoring is essential.
Consult a healthcare provider immediately if you experience severe symptoms such as difficulty breathing, chest pain, confusion, persistent high fever, or if symptoms worsen after initial improvement. Early medical consultation is crucial for high-risk individuals.
Limitations
- ⚠A negative result does not completely rule out Influenza A infection, especially if the sample was collected late in the course of illness or if the viral load is below the detection limit.
- ⚠The test detects Influenza A but does not differentiate subtypes (e.g., H1N1, H3N2) unless additional testing is performed.
- ⚠Viral load may not directly correlate with disease severity in all patients, as host immune response also plays a role.
- ⚠Results should be interpreted in conjunction with clinical findings and other laboratory tests.
Risks & Considerations
- ●Mild discomfort during sample collection.
- ●Slight risk of bleeding from the nasal passage if the swab is inserted too deeply (rare).
- ●No significant systemic risks associated with the test.
Interfering Factors
- ●Improper sample collection (e.g., inadequate swab) may lead to false negatives.
- ●Sample degradation due to delayed transport or improper storage.
- ●Presence of inhibitors in the sample (e.g., blood, mucus) that may affect PCR amplification.
- ●Recent antiviral therapy may reduce viral load, leading to false low results.
- ●Cross-contamination during sample processing.
Compare With Similar Tests
| Test | Influenza A Viral Load Quantitative Test | Rapid Influenza Diagnostic Test (RIDT) | Influenza A/B Qualitative PCR | Viral Culture |
|---|---|---|---|---|
| Comparison | Influenza A Viral Load Quantitative Test |
Frequently Asked Questions
What is the cost of the Influenza A Viral Load Quantitative Test?
How is the sample collected for this test?
Do I need to fast before the test?
How long does it take to get the results?
What does a 'detected' result mean?
Can this test differentiate between Influenza A subtypes like H1N1?
Is home sample collection available?
What is the difference between this test and a rapid flu test?
Who should get this test?
Are there any risks associated with the test?
Can I take antiviral medication before the test?
Is the test covered by insurance?
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