[Occupational exposure to hepatitis B virus in personnel of the S.S. Trinità Hospital in Borgomanero].

369 workers at the S.S. Trinità Hospital, Borgomanero - Health Unit 54 were screened for H.B.V. H.B.V. markers were found in 49.9% of whom 28% presented a profile of immunization, 1.9% were found to be chronic carriers of HBsAg, 18.1% were only positive for anti-HBc and 1.9% presented a doubtful serum profile that will require further study. Women and senior staff (in terms of both age and seniority of service) were most often affected. In view of the high rate of H.B.V. infection, preventive vaccination is though necessary to protect the workers' health.