The natural history and antiviral treatment of hepatitis C in haemophilia.

People with haemophilia who received non-virucidally treated large-pool clotting factor before 1986 were infected with hepatitis C virus (HCV), previously referred to as non-A, non-B hepatitis. Approximately one-tenth of patients have been shown to clear infection naturally and shown persistently negative HCV PCR. Patients have been infected with genotypes 1, 2 and 3 reflecting the plasma donors in Northern Europe and the United States. Several studies have shown that HCV mono-infection has a very slow progression. Co-infection with human immunodeficiency virus (HIV), however, can hasten the progression to cirrhosis and liver failure. Genotype 1 and older age at first infection also increase the progression rate. Candidates with detectable HCV RNA are candidates for therapy. The combination of standard interferon-alpha and ribavirin doubles the effectiveness of interferon-alpha alone and is the current standard of care for the treatment of chronic hepatitis C. The duration of therapy depends on the genotype and level of viraemia. Patients with genotypes 2 or 3 should have 6 months' therapy while those with genotype 1 and > 2 million copies mL-1 should have 1 year of therapy. Pegylated interferon is an emerging therapy. Patients co-infected with HIV, in whom treatment has stabilized the HIV infection, may be able to tolerate therapy for HCV infection. Liver transplantation is indicated for patients with haemophilia who have decompensated hepatitis C infection.