Limits of diagnostic accuracy of anti-hepatitis C virus antibodies detection by ELISA and immunoblot assay.

When human sera samples are tested for anti-hepatitis C virus (HCV) antibodies using different ELISA kits as well as immunoblot assay kits discrepant results often occur. As a result the diagnostics of HCV infection in such sera remains unclear. The purpose of this investigation is to define the limits of HCV serodiagnostics.

[Type-specific antibodies to hepatitis C virus in sera from patients with various hematologic diseases].

The reactivity of 100 sera taken from patients with different blood diseases and donors with respect to synthesized peptides in the variable area of protein NS4 of hepatitis C virus was studied. The presence of type-specific antibodies in the blood sera of patients with hepatitis C was shown. Two antigenic determinant corresponding to 1683-1705 and 1711-1732 amino acid residues in the protein area under study were detected.

[Detection of hepatitis C markers--nucleocapsid protein, RNA and virus-specific antibodies in blood donor plasma].

Comparative study of hepatitis C virus (HCV) markers (core protein, RNA, and virus-specific antibodies) was carried out in plasma samples from 80 donors. A method based on sandwich ELISA with monoclonal antibodies to recombinant protein was developed for measuring core protein. Nucleocapsid protein was detected after various treatments of precipitates obtained after concentration of virus-containing material from plasma samples.

[The serodiagnosis of viral hepatitis C].

Sensitivities and specificities of four commercial enzyme immunoassay test systems manufactured by Ortho (USA), Abbott (USA), Organon (Netherlands), Innotest (Belgium) and of three pilot Russian diagnostic agents created at the Mazaĭ Research and Production Amalgamation (Moscow) and the D. I. Ivanovskiĭ Institute of Virology (Moscow) and Pasteur Institute (St.