What bacteria causes UTI?
The most common UTIs occur mainly in women and affect the bladder and urethra. Infection of the bladder (cystitis). This type of UTI is usually caused by Escherichia coli (E. coli), a type of bacteria commonly found in the gastrointestinal (GI) tract. However, sometimes other bacteria are responsible. What bacteria causes UTI Besides E. coli? Between 65% and 90% of urinary tract infections (UTIs) in children are caused by Escherichia coli.