what is the most common cause of uncomplicated urinary tract infections?
Escherichia coli is the most common cause of uncomplicated UTI and accounts for approximately 75 to 95 percent of all infections.2-5 A longitudinal study6 of 235 women with 1,018 UTIs found that E. coli was the only causative agent in 69.3 percent of cases and was a contributing agent in an additional 2.4 percent of cases.