A computerized analysis of hospital acquired urinary tract infections from 1973-1976 as well as 1981-1982 was done at our institution. A change in the classic picture of "gramnegative infections" was observed. Grampositive germs such as enterococci and staphylococci increased in their significance. The incidence of bacteremia and sepsis was lowered. This success is due to strict antiseptic measures as well as to the more frequent use of the suprapubic puncture catheter instead of the transurethral catheter.