ABSTRACT
We conducted a comparative microbiological trial to determine the characteristics of urinary tract infections (UTI) in ddifferente population groups. Infections of the urinary tract are among the most commonly encountered of all bacterial infections: they are experienced by children as well as by adults and in both ambulatory and hospitalized patients. The frequency of urinary infections increases with the age, mainly in females, even with normal urinary tract. the term significant bacteriuria refers to the presene of bacteria more than 10 elevado a la quinta colony-forming units per milliter. Asymptomatic (covert) bacteriuria is the presence of significant bacteeriiuria in the absence of any simpotoms attributable to infection. Most infections are caused by Enterobacteriaceae with higher prevalence of Escherichia coli. Diagnosis of UTI requires culture of urine, but urine microscopy for bacteriiuria may provide important information before culture results are available. About 40 por ciento of nosocomial infections involve the urinary tract, with most associated with indwelling urethral catheters. They are the most common source of gram-negative bacteriuria in hospitalized patients. Major risk groups have been associated with an increased incidence of UTI: female sex, advanced age and severe general debility. We conducted a randomized study of 2,730 episodesof significant bacteriuria to determine the prevalence and antimicrobial susceptibility of the bacteriologic isolations and therapeutic responses to antimicrobial therapy