A 38-year-old man from rural India presents with jaundice, dark urine, and clay-colored stools for 10 days. He has no history of intravenous drug use or sexual promiscuity. Serological testing shows anti-HAV IgM positive, anti-HBc negative, anti-HCV negative. All of the following statements regarding hepatitis A are correct EXCEPT:

Explanation

## Identifying the Incorrect Statement **Key Point:** Hepatitis A does NOT cause chronic infection. This is the fundamental distinguishing feature of HAV among hepatotropic viruses. ### Why Option 1 (Chronic Hepatitis A) is WRONG Hepatitis A is an **acute, self-limited infection** with no chronic phase. The virus is cleared by the immune system within weeks to months, and **no carrier state exists**. Approximately 70–80% of infected adults develop symptomatic hepatitis; the remainder have subclinical infection. However, ALL infected individuals eventually clear the virus and develop lifelong immunity. **High-Yield:** HAV ≠ chronic disease. Contrast this with HBV (5–10% chronic in adults) and HCV (70–85% chronic). ### Verification of Correct Statements | Feature | Details | |---------|----------| | **Virus family** | Picornaviridae (non-enveloped, +ssRNA) — Option 0 ✓ | | **Transmission** | Fecal-oral; peak infectivity 1–2 weeks before jaundice — Option 2 ✓ | | **Anti-HAV IgM** | Appears at symptom onset, persists 3–6 months; diagnostic of acute HAV — Option 3 ✓ | ### Clinical Pearl The **absence of chronic hepatitis A** is why: - No antiviral therapy is needed (supportive care suffices). - Vaccination provides lifelong protection. - Fulminant hepatic failure, though rare, is the main life-threatening complication in adults. **Warning:** Do not confuse HAV with HBV or HCV. A patient with anti-HAV IgM and anti-HBc negative / anti-HCV negative has acute HAV only — no risk of chronicity.