Hepatology · Article 188

How Should Hepatitis D Be Screened for in Patients With Hepatitis B?

Hepatitis D screening requires a structured, evidence-based clinical approach. This review summarizes the key diagnostic, management, monitoring and decision points for gastroenterology and hepatology practice.

Hepatitis D screening clinical reference — Related free clinical resource: Guideline-Based Management in Hepatology.

Hepatitis D screening: practical clinical approach

This page focuses on Hepatitis D screening with emphasis on decisions that change patient care, common pitfalls, and the current evidence base.

External guidance for Hepatitis D screening

Clinical takeaway: For Hepatitis D screening, decisions should integrate current guidelines, patient-specific risk, and the evidence summarized below.

Answer first: HDV can occur only in people with HBV infection, and it accelerates fibrosis, decompensation and HCC risk. Screening begins with anti-HDV antibody in an HBsAg-positive patient; a positive antibody test should be followed by HDV RNA to establish active infection. Because risk-factor-based testing misses cases and new treatment is now available, the threshold for testing HBsAg-positive patients should be low, particularly in people from endemic areas, persons with injection-drug exposure, HIV/HCV coinfection, unexplained ALT elevation or unexpectedly rapid liver disease.

Anti-HDV identifies exposure

It does not distinguish resolved from active infection.

HDV RNA confirms current replication

RNA testing is essential before treatment decisions.

Think HDV when HBV DNA seems too low for the liver disease

Severe hepatitis with suppressed or modest HBV DNA is a classic clue.

Practical clinical algorithm

1. Identify all HBsAg-positive patients.

2. Order anti-HDV at least once when screening is indicated or local policy supports broad testing.

3. If positive, obtain quantitative/qualitative HDV RNA.

4. Stage fibrosis and evaluate for cirrhosis.

5. Assess HCC surveillance and treatment candidacy.

6. Vaccinate susceptible household/sexual contacts against HBV, which also prevents HDV.

Common mistakes to avoid

Testing HDV only when HBV DNA is high.
Stopping after a positive antibody without RNA.
Assuming normal ALT excludes HDV.
Failing to stage fibrosis.
Forgetting that HBV vaccination prevents HDV infection indirectly.

Trainee takeaway

In any HBsAg-positive patient with unexpectedly aggressive disease, HDV should move near the top of the differential.

Frequently asked questions

Can someone get HDV without HBV?

No; HDV requires HBsAg.

What confirms active infection?

Detectable HDV RNA.

Does HBV vaccination prevent HDV?

Yes, by preventing the HBV infection HDV requires.

References

1. Thomson ABR. Guideline-Based Management in Hepatology. CAPstone Academic Publishers; 2015.

2. Thomson ABR. Practice Review in Hepatopancreaticobiliary Diseases and Nutrition. CAPstone Academic Publishers; 2014.

3. Terrault NA, et al. AASLD 2018 Hepatitis B Guidance. Hepatology. 2018;67:1560-1599.

Educational content only. Clinical decisions should incorporate the individual patient, local resources, product labeling, and the most current applicable guideline or regulatory information.

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