[Urinary tract infections].

From the viewpoint of prevention of nosocomial infections, the urinary indwelling catheter should be carefully managed. Under long term indwelling, prophylactic antimicrobial chemotherapy is no sense and generally bladder irrigation is also not necessary. In this paper, the characteristics of urinary tract infections due to MRSA and P. aeruginosa is described. The incidence of MRSA isolation from urine is increasing in recent several years. The distinction between infections and colonizations is important.