what bacteria causes uti
Bacterial UTI Causes. In most cases, the causes of a UTI involve a type of bacteria, Escherichia coli (E. coli), which normally lives in the colon. In many cases, bacteria first travel to the urethra.When bacteria multiply, a UTI can occur. A UTI that is limited to the urethra is called urethritis.acterial UTI Causes. In most cases, the causes of a UTI involve a type of bacteria, Escherichia coli (E. coli), which normally lives in the colon. In many cases, bacteria first travel to the urethra.