what is a colonized urinary tract infection
A urinary tract infection (UTI) is a condition where one or more parts of the urinary system (the kidneys, ureters, bladder, and urethra) become infected. UTIs are the most common of all bacterial infections and can occur at any time in the life of an individual.nfection does not always occur when bacteria are introduced into the bladder. A number of defense systems protect the urinary tract against infection-causing bacteria: 1  Urine itself functions as an antiseptic, washing potentially harmful bacteria out of the body during normal urination.