Viral hepatitis B and C outbreak related to parenteral treatment at an oncological department in Slovakia.

The Regional Public Health Authority was notified about four cases of viral hepatitis (B and C) among patients with pre-event history of hospitalization at an oncological ward. An outbreak investigation was commenced in response. Forty-seven cases of viral hepatitis B and C in 39 patients hospitalized during the period from September 2009 to July 2010 were registered. We found an association between parenteral treatment and disease (hepatitis B: χ(2) = 49.53; P < 0.001; hepatitis C: χ(2) = 22.42; P < 0.001). Despite using disposable materials, there remains a risk of transmission of bloodborne virus infections in hospitals due to poor adherence to standard procedures.