Hepatitis C Antibody Test and HCV RNA: Cured vs Chronic Explained
Anti-HCV antibody detects exposure; HCV RNA confirms active infection. In the era of direct-acting antivirals, hepatitis C is curable in over 95% of patients. Learn the test pathway and what a positive result means today.
Anti-HCV antibody positive indicates exposure at some point — not current infection. HCV RNA (viral load) confirms active infection. Modern direct-acting antivirals cure > 95% of patients in 8–12 weeks. Sustained virological response (SVR12 — undetectable HCV RNA 12 weeks after treatment) equates to cure.
HCV screening starts with anti-HCV antibody. A positive antibody triggers HCV RNA testing: (1) RNA positive → active infection, treat with DAA; (2) RNA negative → past infection cleared spontaneously or after treatment (~25% clear spontaneously). Universal one-time HCV screening in adults 18–79 is now recommended by USPSTF and CDC. Direct-acting antivirals (sofosbuvir/velpatasvir, glecaprevir/pibrentasvir) achieve SVR12 in > 95% across genotypes. After cure, anti-HCV remains positive lifelong but RNA stays undetectable unless re-infected. Cirrhotic patients need continued HCC surveillance after cure.
- First-line
- Anti-HCV antibody
- Confirm active infection
- HCV RNA (PCR)
- Cure rate with DAA
- > 95%
- Cure definition
- SVR12 = undetectable HCV RNA 12 weeks post-treatment
- Screening age (USPSTF)
- 18–79 years, at least once
How to read the two-step algorithm
Anti-HCV positive but RNA negative: past infection cleared (spontaneously in ~25% of exposed persons, or after successful treatment). Anti-HCV positive with RNA positive: active infection — start DAA therapy. Anti-HCV negative: no exposure detected (window period 4–10 weeks). If recent high-risk exposure, HCV RNA is the earliest test.
Hepatitis C test interpretation
| Anti-HCV | HCV RNA | Interpretation |
|---|---|---|
| Negative | — | No exposure detected (repeat if recent exposure) |
| Positive | Detectable | Active infection — treat with DAA |
| Positive | Undetectable | Past infection, cleared (spontaneously or after cure) |
| Positive but low signal | Undetectable | False positive possible; repeat |
- HCV RNA positive + jaundice, ascites or encephalopathy — decompensated cirrhosis workup.
- HCV RNA positive + planning pregnancy — treat before conception.
- HCV cured but new liver mass — HCC surveillance active.
- Persistent HCV RNA after DAA course — resistance testing.
HCV workup
- 1Anti-HCV positive?Order HCV RNA. Positive = active infection, treat. Negative = past infection cleared.
- 2HCV RNA positive?Assess fibrosis (FibroScan or APRI), start DAA therapy.
- 3SVR12 confirmed?Cured. Continue HCC surveillance only if cirrhotic. Educate on re-infection risk.
- 4Recent needle-stick or transfusion?HCV RNA at 2–4 weeks; anti-HCV at 4 and 12 weeks.
Related questions people ask
- What are direct-acting antivirals?
- Is hepatitis C curable?
- Do I need HCV screening?
- How does HCV compare to HBV?
- Why is ALT raised in HCV?
- Do I still need HCC surveillance after cure?
- Can I get re-infected?
Frequently asked questions
- Two-step algorithm: anti-HCV → HCV RNA.
- Anti-HCV positive alone is NOT active infection.
- DAAs cure > 95% in 8–12 weeks.
- Cure = SVR12 (undetectable RNA 12 weeks post-treatment).
- Cirrhotic patients need HCC surveillance even after cure.
- USPSTF recommends one-time screening in adults 18–79.
References
3 sources- AASLD/IDSAHCV Guidance
US HCV management.
hcvguidelines.org
- EASLHCV Guidelines
European HCV framework.
easl.eu
- WHOHepatitis C
Global HCV framework.
who.int
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