Using PCR and genomic sequencing, we confirmed the presence of and homology between hepatitis G virus (HGV) (also called GB virus C) RNA in six serum samples and that in two saliva samples obtained from 34 patients with chronic hepatitis C virus infections. Thus, HGV may be found outside the circulatory system.
The presence and levels of hepatitis C virus (HCV) RNA and immunoglobulin M (IgM) and IgG antibodies against the virus core protein were determined in 449 serum specimens. Despite the fact that a relationship between the presence, but not the levels, of HCV RNA and HCV IgM was observed, the significance of HCV core IgM assays seems limited.
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