Hepatitis B DNA Detection Test: Diagnosis, Method, and Clinical Use
Hepatitis B DNA detection test
Synonyms
DNA Hybridization Test for HBV, DNA Probe Test for HBV, HBV DNA, HBV PCR, Hepatitis B Viral DNA Assay
Test Commonly Includes
Detection of hepatitis B viral DNA in serum or tissue samples using a DNA probe or polymerase chain reaction (PCR).
Abstract
Hepatitis B virus (HBV) can lead to a chronic carrier state or progressive liver damage. Surface antigens and antibodies may not be detectable in all chronic cases. HBV DNA detection identifies active infection in cases where serologic tests may miss the diagnosis, especially in chronic liver disease of unknown origin.
Specimen
- Serum or plasma
- Liver tissue
Container
- Sterile container
- Red top or lavender top (EDTA) tube
Collection
Standard venipuncture for blood. Tissue must be from affected region and frozen properly.
Storage Instructions
- Serum/plasma: Freeze at -20°C
- Tissue: Freeze at -70°C
Reason to Reject Sample
- Presence of sodium azide
- Unfrozen or thawed tissue samples
Turnaround Time
4–7 days (may vary by lab)
Use
– Helps differentiate HBV from other causes of hepatitis
– Identifies chronic HBV infection
– Evaluates viral replication and infectivity
Limitations
- DNA analysis does not replace serology
- Samples with preservatives like sodium azide are not suitable
Methodology
Slot-blot hybridization: DNA is extracted, denatured in an alkaline solution, and filtered onto a nylon membrane. A radiolabeled HBV-specific DNA probe binds to the viral DNA. Hybridization is detected using autoradiography.
Additional Information
This test correlates well with infectivity and viral load. Combining HBV DNA results with HBsAg, anti-HBc, and anti-HBs testing provides a more accurate picture of disease status. PCR-based HBV DNA testing may become standard due to higher sensitivity and faster results.
References
- Jacobs, Demott, Finley, Horvat, Kasten.JR, & Tilzer. “Laboratory Test Handbook”, Lexi-Comp Inc, 1994
- Brechot C et al. N Engl J Med, 1985
- Larzul D et al. J Virol Methods, 1988
- Kaneko S et al. J Clin Microbiol, 1989
- Weller IVD et al. J Med Virol, 1982
