HBV DNA PCR Viral Load

Function

The HBV DNA PCR (Polymerase Chain Reaction) test is a highly sensitive molecular assay that quantifies the actual amount of Hepatitis B virus circulating in the blood. Unlike antibody tests which show the body's reaction to the virus, this test measures the 'viral load.'

Why it is Ordered

This test is essential for managing patients with chronic Hepatitis B. It is used to determine when to start antiviral therapy, to monitor the effectiveness of treatment, and to assess the risk of disease progression to cirrhosis or hepatocellular carcinoma (liver cancer). A high viral load usually indicates active viral replication and higher infectivity.

Associated Conditions

• Chronic Hepatitis B: Long-term infection of the liver.
• HBeAg-negative Chronic Hepatitis: A variant where the virus mutates but still replicates.
• Cirrhosis: Severe scarring of the liver often linked to high viral loads.
• Liver Cancer: Patients with high DNA levels are at a significantly increased risk.

Clinical Monitoring

During treatment (e.g., with Tenofovir or Entecavir), the goal is to reach 'Undetectable' levels. Sudden spikes in viral load during treatment can indicate drug resistance or poor patient compliance.