HCV RNA and antibody to HCV core protein in Japanese patients with chronic liver disease

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Abstract
We evaluated the prevalence of hepatitis C virus (HCV) RNA and antibody (anti-HCVcore) to the putative HCV core protein in Japanese patients with chronic liver disease. Sera were screened by solid-phase enzyme immunoassay with a recombinant HCV core protein and by the reverse transcription-polymerase chain reaction (RT-PCR) test which directly detects the HCV genome. Anti-HCVcore was detected with high titers in 95% (69/73) of chronic non-A, non-B hepatitis, and 94% (65/69) of anti-HCVcore-positive patients had the genome. Anti-HCVcore was also found with lower titers in 24% (10/41) of chronic hepatitis B virus carriers, and three of them had the genome. Only one (3%) of the 35 patients negative for anti-HCVcore tested positive to RT-PCR. These findings indicate the overwhelming prevalence of HCV infection in Japanese patients with chronic non-A, non-B hepatitis and a close relationship between the presence of anti-HCVcore and chronic hepatitis C in this population.