[Catheter-associated urinary tract infection].

Nosocomial urinary tract infections are the most common nosocomial infections. Their main risk factor is the urinary catheter The daily incidence of acquisition of microorganisms in the urine of a patient with a urinary catheter is 3 to 10% per day of catheterization, representing a cumulative risk of 100% after 30 days. The Gram-negative bacilli account for about two-thirds of isolated microorganisms led by Escherichia col. To prevent infections occurring with urinary catheterization, indications of the latter should be limited. When catheterization is essential, strict hygiene rules and proper use must be respected. Antibiotic treatment of infection with urinary catheter must take into account the diffusion of antibiotic, resistance of the main bacteria involved and patient characteristics.