[Hospital acquired urinary tract infection (author's transl)]

To explain hospital acquired urinary tract infections in a Urological Clinic, 3691 case histories were evaluated. About 15% of iatrogenic infections were found, among them 7% bacteremias and 0.9% of cases with urosepsis. Autoinfection and intermittent infections should be differentiated. The iatrogenic infection can be prevented by avoiding certain diagnostic and operative interventions, observation of asepsis and exact indication, the autoinfection and intermittend infection by shortening the period of hospitalization. The observed different risk of infection of individual organ systems had its origin, not in a low defense potency but in the operative technique used.