Low-Dose Peginterferon and Ribavirin to Treat Chronic Hepatitis C in Patients Infected With HCV Genotype 2 or 3

* INCLUSION CRITERIA: Age above 18 years, male or female. Presence of anti-HCV in serum. Positive HCV RNA determination in serum. HCV genotype 2 or 3 as determined by Inno LiPa assay or by direct sequencing. Patients with mixed genotypes will not be eligible if they have genotypes other than 2 or 3. Written informed consent. EXCLUSION CRITERIA: Previous treatment with interferon alpha or peginterferon. Decompensated liver disease, as marked by bilirubin greater than 4 mg/dL, albumin less than 3.0 g/dL, prothrombin time greater than 2 sec prolonged, or history of bleeding esophageal varices, ascites or hepatic encephalopathy. Patients with ALT levels greater than 1000 U/L (greater than 25 times ULN) will not be enrolled but may be followed until three determinations are below this level. Pregnancy or, in women of child-bearing potential or in spouses of such women, inability to practice adequate contraception, defined as vasectomy in men, tubal ligation in women, or use of condoms and spermicidal, or birth control pills, or an intrauterine device. Significant systemic or major illnesses other than liver disease, including congestive heart failure, renal failure (creatinine clearance less than 50 ml/min), organ transplantation, serious psychiatric disease not controlled by psychotropic agents, and angina pectoris. Evidence of coronary artery disease or cerebral vascular disease, including abnormalities on exercise stress testing in patients with defined risk factors who will be screened for evidence of underlying coronary artery disease. Pre-existing, severe bone marrow compromise; anemia (hematocrit less than 30%), neutropenia (less than 1000 neutrophils/microliter) or thrombocytopenia (less than 70,000 cells/microliter). History of hemolytic anemia. Evidence of another form of liver disease in addition to hepatitis C (for example hepatitis B, autoimmune liver disease, Wilson's disease, alcoholic liver disease). Active substance abuse, such as alcohol, inhaled or injection drugs within the previous six months. Evidence of hepatocellular carcinoma: either alfa-fetoprotein (AFP) levels greater than 50 ng/ml (normal less than 9 ng/ml) and/or ultrasound (or other imaging study) demonstrating a mass suggestive of liver cancer. Clinical gout. HIV infection. Quiescent or active, serious autoimmune disease such as lupus erythematosus, ulcerative colitis, Crohn's disease or rheumatoid arthritis that in the opinion of the investigators might be exacerbated by therapy with alfa interferon. The use of immunosuppressive medications, including corticosteroids in doses of 10 mg of prednisone or its equivalent and higher.