[Risk of infection in a hospital environment]

The infectivologic risk in hospital environment. After a brief introduction on the historical development of the question of infectivologic risk in health services in general, and, in particular, in hospitals, the principal epidemiologic characteristics of viral hepatitis B and C, of HIV/AIDS and of TBC are examined as well as the potential cancerogenic role of the viral hepatitis. Guide-lines on staff health observation are also presented along with work-fitness criteria.