Urinary Tract Infections - Adults

What is a urine infection and what causes it? Most urine infections are caused by germs (bacteria) that come from your own bowel. They cause no harm in your bowel, but can cause infection if they get into other parts of your body. Some bacteria lie around your back passage (anus) after you pass a stool (faeces). These bacteria sometimes travel to your urethra (the tube from the bladder that passes out urine) and into your bladder. Some bacteria thrive in urine and multiply quickly to cause infection.

A urine infection is often called a urinary tract infection (UTI) by doctors. When the infection is just in the bladder and urethra, this is called a lower UTI. If it travels up to affect one or both kidneys as well then it is called an upper UTI This can be more serious than lower UTIs, as the kidneys can be damaged by the infection.

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