How do you get a urinary tract infection?

Here are some... UTI emerges while personal defense ability does not suffice or fails to kill or eliminate the invading bacteria. Example, toothbrushing may result in bacteremia in many daily but without sickness; likewise does UTI. While bacterial presence is essential to get infection, that is not always the case; to become infected, some noticeable causes can be traced ... like incomplete emptying bladder...