HBV DNA Quantitative Test Normal Range
At a Glance
- Sample Required: Blood (serum or plasma)
- Fasting Rules: No fasting required
- Turnaround Time (TAT): 1-2 business days
- Base Cost: [Insert Current 2026 Price]
Why is HBV Quantitative Test Done?
The Hepatitis B Virus (HBV) DNA quantitative test, also known as viral load testing, is essential for:
- Managing patients with chronic hepatitis B (CHB) who are on antiviral therapy.
- Establishing baseline viral load before starting treatment.
- Monitoring response to antiviral therapy over time.
- Assessing disease progression and risk of liver complications.
Normal Reference Range and Quantification
The quantification range of this assay is 20 to 170,000,000 IU/mL (1.30–8.23 log IU/mL). A quantitative result expressed in IU/mL indicates the degree of active HBV replication in the patient.
A result with the statement "Detected" shows the level as <20 IU/mL (<1.30 log IU/mL). This assay cannot accurately quantify HBV DNA below this level, indicating that the HBV DNA level is below the lower limit of quantification for this assay.
Interpretation of HBV DNA Test Results
The presence of HBV DNA in the blood is a sign of active viral replication. HBV DNA levels are detectable by 30 days following infection. If not detected and managed early, it can progress to acute hepatitis.
In cases of acute viral hepatitis, the HBV DNA test is more useful than the HBsAg test for early detection. In chronic infection, viral load can decrease and disappear if the infection resolves spontaneously.
Patients with chronic active HBV are at greater risk for more serious liver disease and are more infectious than patients with inactive HBV infection. This test is intended for use as an aid in the management of patients with chronic HBV infection undergoing antiviral therapy.
The test can be used to measure HBV DNA levels at baseline and during treatment to assess response. Results must be interpreted within the context of all relevant clinical and laboratory findings.
HBV DNA Levels and Clinical Significance
| HBV DNA Level (IU/mL) | Interpretation |
|---|---|
| <20 | Below lower limit of quantification; may indicate low or undetectable viral load. |
| 20 – 200,000 | Low to moderate viral load; often seen in inactive carriers or early infection. |
| >200,000 | High viral load; indicates active replication and increased infectivity. |
Phases of Chronic Hepatitis B Infection
Chronic hepatitis B infection is characterized by four phases. Not everyone will experience all four phases, and the lengths of the phases vary among individuals. Many people living with hepatitis B will transition between these phases.
| Phase | Key Features |
|---|---|
| Immune Tolerant | High HBV DNA, normal ALT, minimal liver damage. |
| Immune Active (HBeAg-positive) | High HBV DNA, elevated ALT, active liver inflammation. |
| Inactive Carrier | Low or undetectable HBV DNA, normal ALT, minimal liver damage. |
| HBeAg-negative Chronic Hepatitis | Fluctuating HBV DNA and ALT, ongoing liver inflammation. |
Why Choose DNA Labs India for HBV DNA Testing?
DNA Labs India is an ISO 9001 certified laboratory offering accurate and reliable HBV DNA quantitative testing. Our state-of-the-art molecular diagnostics ensure precise viral load measurement to guide clinical decisions.
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