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A urinary tract infection (UTI) is an infection in any part of the urinary system. The urinary system includes the kidneys, ureters, bladder and urethra. Most infections involve the lower urinary tract — the bladder and the urethra.
Women are at greater risk of developing a UTI than are men. If an infection is limited to the bladder, it can be painful and annoying. But serious health problems can result if a UTI spreads to the kidneys.Women are at greater risk of developing a UTI than are men. If an infection is limited to the bladder, it can be painful and annoying. But serious health problems can result if a UTI spreads to the kidneys.
UTIs don't always cause symptoms. When they do, they may include:
UTIs typically occur when bacteria enter the urinary tract through the urethra and begin to spread in the bladder. The urinary system is designed to keep out bacteria. But the defenses sometimes fail. When that happens, bacteria may take hold and grow into a full-blown infection in the urinary tract.
The most common UTIs occur mainly in women and affect the bladder and urethra.
Infection of the bladder. This type of UTI is usually caused by Escherichia coli (E. coli). E. coli is a type of bacteria commonly found in the gastrointestinal (GI) tract. But sometimes other bacteria are the cause. Having sex also may lead to a bladder infection, but you don't have to be sexually active to develop one. All women are at risk of bladder infections because of their anatomy. In women, the urethra is close to the anus. And the urethral opening is close to the bladder. This makes it easier for bacteria around the anus to enter the urethra and to travel to the bladder.
Infection of the urethra. This type of UTI can happen when GI bacteria spread from the anus to the urethra. An infection of the urethra can also be caused by sexually transmitted infections. They include herpes, gonorrhea, chlamydia and mycoplasma. This can happen because women's urethras are close to the vagina.
UTIs are common in women. Many women experience more than one UTI during their lifetimes.
Risk factors for UTIs that are specific to women include:
Female anatomy. Women have a shorter urethra than men do. As a result, there's less distance for bacteria to travel to reach the bladder.
Sexual activity. Being sexually active tends to lead to more UTIs. Having a new sexual partner also increases risk.
Certain types of birth control. Using diaphragms for birth control may increase the risk of UTIs. Using spermicidal agents also can increase risk.
Menopause. After menopause, a decline in circulating estrogen causes changes in the urinary tract. The changes can increase the risk of UTIs.
Urinary tract problems. Babies born with problems with their urinary tracts may have trouble urinating. Urine can back up in the urethra, which can cause UTIs.
Blockages in the urinary tract. Kidney stones or an enlarged prostate can trap urine in the bladder. As a result, risk of UTIs is higher.
A suppressed immune system. Diabetes and other diseases can impair the immune system — the body's defense against germs. This can increase the risk of UTIs.
Catheter use. People who can't urinate on their own often must use a tube, called a catheter, to urinate. Using a catheter increases the risk of UTIs. Catheters may be used by people who are in the hospital. They may also be used by people who have neurological problems that make it difficult to control urination or who are paralyzed.
A recent urinary procedure. Urinary surgery or an exam of your urinary tract that involves medical instruments can both increase the risk of developing a UTI.
When treated promptly and properly, lower urinary tract infections rarely lead to complications. But left untreated, UTIs can cause serious health problems.
Complications of a UTI may include:
These steps may help lower the risk of UTIs:
Drink plenty of liquids, especially water. Drinking water helps dilute the urine. That leads to urinating more often — allowing bacteria to be flushed from the urinary tract before an infection can begin.
Try cranberry juice. Studies that look into whether cranberry juice prevents UTIs aren't final. However, drinking cranberry juice is likely not harmful.
Wipe from front to back. Do this after urinating and after a bowel movement. It helps prevent the spread of bacteria from the anus to the vagina and urethra.
Empty your bladder soon after having sex. Also drink a full glass of water to help flush bacteria.
Avoid potentially irritating feminine products. Using them in the genital area can irritate the urethra. These products include deodorant sprays, douches and powders.
Change your birth control method. Diaphragms, unlubricated condoms or condoms treated with spermicide can contribute to bacterial growth.
Tests and procedures used to diagnose urinary tract infections include:
Analyzing a urine sample. Your health care provider may ask for a urine sample. The urine will be looked at in a lab to check for white blood cells, red blood cells or bacteria. You may be told to first wipe your genital area with an antiseptic pad and to collect the urine midstream. The process helps prevent the sample from being contaminated.
Growing urinary tract bacteria in a lab. Lab analysis of the urine is sometimes followed by a urine culture. This test tells your provider what bacteria are causing the infection. It can let your provider know which medications will be most effective.
Creating images of the urinary tract. Recurrent UTIs may be caused by a structural problem in the urinary tract. Your health care provider may order an ultrasound, a CT scan or MRI to look for this issue. A contrast dye may be used to highlight structures in your urinary tract.
Using a scope to see inside the bladder. If you have recurrent UTIs, your health care provider may perform a cystoscopy. The test involves using a long, thin tube with a lens, called a cystoscope, to see inside the urethra and bladder. The cystoscope is inserted in the urethra and passed through to the bladder.
Antibiotics usually are the first treatment for urinary tract infections. Your health and the type of bacteria found in your urine determine which medicine is used and how long you need to take it.
Medicines commonly used for simple UTIs include:
The group of antibiotics known as fluoroquinolones isn't commonly recommended for simple UTIs. These drugs include ciprofloxacin (Cipro), levofloxacin and others. The risks of these drugs generally outweigh the benefits for treating uncomplicated UTIs.
In cases of a complicated UTI or kidney infection, your health care provider might prescribe a fluoroquinolone medicine if there are no other treatment options.
Often, UTI symptoms clear up within a few days of starting treatment. But you may need to continue antibiotics for a week or more. Take all of the medicine as prescribed.
For an uncomplicated UTI that occurs when you're otherwise healthy, your health care provider may recommend a shorter course of treatment. That may mean taking an antibiotic for 1 to 3 days. Whether a short course of treatment is enough to treat your infection depends on your symptoms and medical history.
Your health care provider also may give you a pain reliever to take that can ease burning while urinating. But pain usually goes away soon after starting an antibiotic.
If you have frequent UTIs, your health care provider may recommend:
For a severe UTI, you may need IV antibiotics in a hospital.
Urinary tract infections can be painful, but you can take steps to ease discomfort until antibiotics treat the infection. Follow these tips:
Dr Sushrut Fuladi is a well-known Consultant Nephrologist and Renal Transplant Physician with expertise in treating patients of Acute Kidney Injury, Chronic Kidney Disease, Hypertension and Diabetes related renal disorders, and renal replacement therapies.
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