Rivanera D, Lilli D, Lozzi MA, Piunno M, Mancini C. Microbiology, Science and Public Health, Rome, Italy Aim: The aim of this study was to evaluate the EIA method for detection of antibody to TTV virus (TTV) and to investigate the anti-TT virus prevalence in patients with hepatitis B (HBV) virus, hepatitis C (HCV) virus, in group of 'high risk'subjects to hepatitis and in healthy subjects.