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Prevalence, implication, and viral nucleotide sequence analysis of GB virus‐C/hepatitis G virus infection in acute fulminant and nonfulminant hepatitis

The clinical impact of GB virus‐C (GBV‐C)/hepatitis G virus (HGV) infection on various causes of acute hepatitis and fulminant hepatitis is controversial. In this study, serum samples from 164 patients with acute hepatitis of various causes, 34 asymptomatic hepatitis B virus (HBV) carriers, and 34 healthy adults were tested for GBV‐C/HGV RNA by reverse transcription‐nested polymerase chain reaction using primers based on the 5′‐untranslated region. Nucleotide sequences of GBV‐C/HGV RNA from various groups were compared. The prevalence of GBV‐C/HGV RNA was significantly higher in patients with acute hepatitis D virus (HDV) superinfection than in HBV carriers or healthy controls (10/37 vs. 2/34, P < 0.02; 10/37 vs. 1/34, P < 0.005). GBV‐C/HGV RNA was detected in 11.1% of acute hepatitis A patients, 9.5% of acute hepatitis B patients, 15.8% of acute hepatitis C patients, 12.5% of acute hepatitis E patients, 11.8% of chronic hepatitis B patients with acute exacerbation, and 11.1% in patients with non‐A to ‐E hepatitis; each was not significantly higher than that in HBV carriers or healthy adults. There were no significant differences in gender, age, serum albumin, bilirubin, and alanine aminotransferase levels nor in the occurrence of fulminant hepatitis (6/28 vs. 36/136) between patients with or without GBV‐C/HGV RNA. All six patients with fulminant hepatitis who had GBV‐C/HGV RNA were complicated by infection with hepatitis B, C, or D. The GBV‐C/HGV clones from 21 patients with or without fulminant hepatitis belonged to group 3. No particular strain of GBV‐C/HGV was associated with fulminant hepatitis. J. Med. Virol. 56:118–122, 1998. © 1998 Wiley‐Liss, Inc.