Objectives: To investigate the prevalence of GB virus C/hepatitis G virus (GBV-C/HGV) and compare the serologic responses to various GBV-C/HGV markers in eastern Taiwan aborigines.
Methods: We used RT-PCR and anti-HGenv u-plate to investigate the prevalence of GBV-C/HGV in eastern Taiwan aborigines. We also used ELISA, dot blot assay, and Western blot to detect the serologic responses to various GBV-C/HGV markers.
Results: The prevalence of GBV-C/HGV RNA in the general population of eastern Taiwan aborigines is about 5% (17/317), while 14% (43/317) have anti-E2 antibodies. There were no significant differences in antibody titer against one consensus core peptide (PPSSAAACSRGSPR) between GBV-C/HGV RNA-positive and -negative sera. Only 23 of 42 serum samples positive in the anti-HGenv u-plate EIA assay were positive (55%) in the dot blot assay. No positive signal was detected by Western blot using either recombinant NS3 or commercial E2 proteins.
Conclusions: Antibodies against one consensus core peptide (PPSSAAACSRGSPR) may not constitute a good marker for the detection of GBV-C/HGV viremia. For the detection of anti-E2 antibodies, the anti-HGenv u-plate assay is more sensitive than the dot blot assay. Western blot assay is not a sensitive method for detecting GBV-C/HGV infection.
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