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Aim: To evaluate the prevalence of HBV, HCV, HDV and HEV infections in populations with different categories of risk and the seroprevalence of HBV and HCV infections in subjects asking for a medical examination.Method: We conducted a cross-sectional, epidemiological study in 2,851 subjects from the SubCarpathian and South-Eastern Romania (including 17 counties, 34% of the country area and 42% of the population). The subjects were divided into four groups: controls (n=2,540, i.e. consecutive subjects asking for a medical examination), subjects with very low risk (students; n=44), with low risk (doctors and nurses; n=93) and with high risk for viral hepatitis (hemodialysis patients; n=174). All subjects were screened for HBsAg, antiHCV and ALT level. In populations at risk, antiHBs, HBeAg, antiHBe, antiHBc (IgG), HBV-DNA, HCV-RNA, antiHDV(IgG) and antiHEV(IgG) were also assessed.Results: In controls, HBV seroprevalence was 5.59% and HCV seroprevalence 4.56%. The risk factors for HBV infection were: age, male gender and South-East region of Romania. The risk factors for HCV infection were: age, female gender, elevated ALT level and the South-East region of Romania. In the very low risk population HBV, HCV, HDV and HEV seroprevalence was: 2.27%, 0%, 0% and 12.5%, respectively. In low risk population the seroprevalence was 2.15%, 1.07%, 0% and 13.98%. In hemodialysis patients, HBV and HCV seroprevalence were 7.91%, respectively 39.26%. HCV-RNA was detectable in 20.69% cases.Conclusion: In the South and South-Eastern Romania the seroprevalence of viral hepatitis infections is intermediate, similar to other Romanian regions or the Balkans.