A Urinary Tract Infection (UTI) is an infection that affects any part of the urinary tract, including the kidneys, ureters, bladder or urethra.
Bacteria from the bowel are the most common cause of UTIs, but fungi and viruses can also cause infection .
The two strains of bacteria Escherichia coli and Staphylococcus saprophyticus account for about 80% of cases.
Common symptoms of UTI include :
- A burning sensation when peeing
- Frequent urination
- Cloudy or dark urine
- Urine with a strong odor
- A feeling of incomplete bladder emptying
- Pelvic pain
Though UTIs can affect anyone, women are more prone to infection. This is because the urethra, the tube that carries urine out of the bladder, is shorter in women than men. This makes it easier for bacteria to enter and reach the bladder.
In fact, nearly half of all women will experience a UTI at some point in their lives .
Antibiotics are used to treat UTIs and are sometimes used in low doses long-term to prevent recurrence.
There are also several natural ways to protect against infections and reduce the risk of recurrence.
Urinary tract infections are common in women, and many women experience more than one infection during their lifetimes. Risk factors specific to women for UTIs include:
- Female anatomy. A woman has a shorter urethra than a man does, which shortens the distance that bacteria must travel to reach the bladder.
- Sexual activity. Sexually active women tend to have more UTIs than do women who aren’t sexually active. Having a new sexual partner also increases your risk.
- Certain types of birth control. Women who use diaphragms for birth control may be at higher risk, as well as women who use spermicidal agents.
- Menopause. After menopause, a decline in circulating estrogen causes changes in the urinary tract that make you more vulnerable to infection.
Other risk factors for UTIs include:
- Urinary tract abnormalities. Babies born with urinary tract abnormalities that don’t allow urine to leave the body normally or cause urine to back up in the urethra have an increased risk of UTIs.
- Blockages in the urinary tract. Kidney stones or an enlarged prostate can trap urine in the bladder and increase the risk of UTIs.
- A suppressed immune system. Diabetes and other diseases that impair the immune system — the body’s defense against germs — can increase the risk of UTIs.
- Catheter use. People who can’t urinate on their own and use a tube (catheter) to urinate have an increased risk of UTIs. This may include people who are hospitalized, people with neurological problems that make it difficult to control their ability to urinate and people who are paralyzed.
- A recent urinary procedure. Urinary surgery or an exam of your urinary tract that involves medical instruments can both increase your risk of developing a urinary tract infection.
The vast majority of urinary tract infections (UTIs) are caused by the bacterium Escherichia coli (E. coli), usually found in the digestive system. Chlamydia and mycoplasma bacteria can infect the urethra but not the bladder.
UTIs are given different names depending on where they occur. For example:
- A bladder infection is called cystitis.
- A urethra infection is called urethritis.
- A kidney infection is called pyelonephritis.
The ureters are very rarely the site of infection.