Chronic hepatitis by virus B (HVB) and/or by virus C (HVC) is a major public-health problem since it presents a long phase of clinical latency which makes its early diagnosis difficult and results in the development of a large number of cases to complications such as cirrhosis, hepatic insufficiency and hepatocarcinoma. In Brazil, it is estimated that the number of HVB patients is two million, but only 72 thousand have been reported. As regards HVC, the ratio is three million estimated cases to 52 thousand reports. Learning about the serological profile of the users of a viral hepatitis reference service is essential for the planning of diagnostic and therapeutic actions; therefore, it is the objective of this study.