A urinary tract infection ( UTI) is an infection in any part of your urinary system including your kidneys, ureters, bladder and urethra ( the structure through which urine passes before being expelled from the body). Most infections involve the lower urinary tract (the bladder and the urethra). The further up the urinary tract an infection occurs, the more serious the infection is.
UTIs usually occur when bacteria enter the urinary bladder through the urethra and begin to multiply. When that happens, bacteria may take hold and grow into a full-blown infection in the urinary tract.
UTIs are classified as simple (uncomplicated) when infections occur in the normal urinary tract. Complicated UTI occurs in an abnormal urinary tract or when the bacteria causing the infection is highly resistant to many antibiotics.
Urinary tract infections don’t always produce symptoms, but when they do they may include:
- A strong, continual urge to urinate
- A burning sensation during urination
- Passing frequent, small amounts of urine
- Urine that appears cloudy
- Urine that appears red, pink, or rust colored ( signaling the presence of blood in the urine). This may indicate a more serious infection and you should contact your doctor.
- Fever or flank pain may indicate an infection of the kidney (pyelonephritis) a more serious infection and should be treated as an emergency.
What Causes Urinary tract infections
Bacteria live in the rectum, vagina and on your skin. Bacteria can migrate from these areas through the urethra and into the bladder. Women are more prone to UTI because they have shorter urethras than men and bacteria can more easily travel into the bladder.
- Sexual activity
- Use of a diaphragm or condoms with spermicidal foam
- Urinary tract instrumentation (foley catheter)
- Obstruction, with blockage of urine flow (stricture of urethra, bladder neck or enlarged prostate)
- Diabetes with decreased immune function reduces our ability to resist bacterial infections
- Anatomic abnormalities (diverticuli of bladder or urethra)
- Nerve communication abnormalities secondary stroke, spinal cord injury, multiple sclerosis, Parkinson disease can cause failure of bladder to store or empty properly (neurogenic bladder)
- Post- menopausal women have reduced estrogen levels that may lead to changes in the vagina that can increase the risk for UTI
- Genetic predisposition. The urinary tract in these patients allow bacteria to adhere more easily and increase the risk for UTI
- Urine culture
- Most uncomplicated UTI can be treated with a short course of oral antibiotics (3 days in most cases ). Complicated UTI (pyelonephritis), may require a longer course
- In addition to antibiotics, increased hydration to increase frequency of urination to help clear bacteria and bladder inflammation. Be sure to complete the full course of antibiotics and call your doctor if symptoms do not improve after the antibiotic course
- For complicated UTIs, frequently recurrent UTIs, additional evaluation of the urinary tract maybe necessary. Studies such as a sonogram or CT scan maybe ordered by your doctor
- Some women who have frequent UTIs especially after sexual activity may benefit from antibiotic prophylaxis and should discuss this option with their doctor. Urination after sexual activity may decrease the risk of UTI by flushing out bacteria. A single dose of an antibiotic after intercourse can help prevent UTI
- Alternative birth control may be needed (diaphragm and spermicidal foam are known risk factors)