title: Coinfection of hepatitis C virus in patients with chronic hepatitis B infection.
abstract: Enzyme-linked immunosorbent assays for detecting antibodies against hepatitis C virus and the polymerase chain reaction were tested in 82 chronic hepatitis B surface antigen carriers for their accuracy in diagnosing patients coinfected with hepatitis B and C viruses. To clarify the role of each virus in chronic hepatitis, serologic assays against hepatitis B virus were also tested. Thirteen (14.9%), 14 (17.1%) and 15 (18.3%) patients were anti-HCV positive using C100 (HCV1), JCC, and a second generation test (HCV2), respectively. HCV RNA was detected by polymerase chain reaction in 9 of 18 anti-HCV-positive cases. Although HCV1 assays were not sufficient, either the JCC or HCV2 assay detected all polymerase chain reaction-positive cases. Fifteen of 18 specimens that were positive in at least one of the three ELISA were seronegative for the hepatitis B e antigen. As judged by HBV DNA polymerase activity, titers of hepatitis B surface antigen and immunoglobulin A antibody against hepatitis B core antigen (IgA anti-HBc), activity of hepatitis B virus replication and immune response against hepatitis B virus in patients with coinfection was decreased to the level of hepatitis B virus asymptomatic carriers. These results show that hepatitis C virus appears to be the primary cause of active hepatitis in most patients with hepatitis B and hepatitis C virus coinfection.
authors.affiliation: Third Department of Internal Medicine, Kumamoto University School of Medicine, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: S
authors.initials: S
authors.lastname: Fujiyama
authors.forename: M
authors.initials: M
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Yamasaki
authors.forename: I
authors.initials: I
authors.lastname: Kuramoto
authors.forename: S
authors.initials: S
authors.lastname: Kawano
authors.forename: T
authors.initials: T
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Mizuno
authors.forename: S
authors.initials: S
authors.lastname: Nonaka
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002908:Chronic Disease; D004279:DNA, Viral / Q000032:analysis / Q000235:genetics; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D016174:Hepacivirus / Q000235:genetics / Q000276:immunology; D006508:Hepatitis Antibodies / Q000032:analysis; D006509:Hepatitis B / Q000150:complications* / Q000175:diagnosis / Q000276:immunology; D006510:Hepatitis B Antibodies / Q000032:analysis; D006512:Hepatitis B Core Antigens / Q000032:analysis; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006515:Hepatitis B virus / Q000235:genetics / Q000276:immunology; D006526:Hepatitis C / Q000150:complications* / Q000175:diagnosis / Q000276:immunology; D018937:Hepatitis C Antibodies; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis / Q000276:immunology; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011237:Predictive Value of Tests; D012367:RNA, Viral / Q000032:analysis / Q000235:genetics
chemical_list: D004279:DNA, Viral; D006508:Hepatitis Antibodies; D006510:Hepatitis B Antibodies; D006512:Hepatitis B Core Antigens; D006514:Hepatitis B Surface Antigens; D018937:Hepatitis C Antibodies; D007070:Immunoglobulin A; D012367:RNA, Viral