Tests and diagnosisBy Mayo Clinic Staff
Tests and procedures used to diagnose urinary tract infections include:
Nov. 30, 2016
- Analyzing a urine sample. Your doctor may ask for a urine sample for lab analysis to look for white blood cells, red blood cells or bacteria. To avoid potential contamination of the sample, you may be instructed to first wipe your genital area with an antiseptic pad and to collect the urine midstream.
- Growing urinary tract bacteria in a lab. Lab analysis of the urine is sometimes followed by a urine culture. This test tells your doctor what bacteria are causing your infection and which medications will be most effective.
- Creating images of your urinary tract. If you are having frequent infections that your doctor thinks may be caused by an abnormality in your urinary tract, you may have an ultrasound, a computerized tomography (CT) scan or magnetic resonance imaging (MRI). Your doctor may also use a contrast dye to highlight structures in your urinary tract.
- Using a scope to see inside your bladder. If you have recurrent UTIs, your doctor may perform a cystoscopy, using a long, thin tube with a lens (cystoscope) to see inside your urethra and bladder. The cystoscope is inserted in your urethra and passed through to your bladder.
- Bennett JE, et al. Urinary tract infections. In: Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 8th ed. Philadelphia, Pa.: Saunders Elsevier; 2015. https://www.clinicalkey.com. Accessed April 20, 2015.
- Urinary tract infections in adults. National Institute of Diabetes and Digestive and Kidney Diseases. http://kidney.niddk.nih.gov/KUDiseases/pubs/utiadult/. Accessed April 15, 2015.
- Bacterial urinary tract infections. Merck Manual Professional Version. http://www.merckmanuals.com/professional/genitourinary-disorders/urinary-tract-infections-uti/bacterial-urinary-tract-infections. Accessed April 23, 2015.
- Grabe M, et al. Guidelines on urological infections. European Association of Urology. http://uroweb.org/guideline/urological-infections/. Accessed April 20, 2015.
- Hooton TM, et al. Acute uncomplicated cystitis and pyelonephritis in women. http://www.uptodate.com/home. Accessed April 20, 2015.
- Cook AJ. Decision Support System. Mayo Clinic, Rochester, Minn. April 22, 2015.
- Geerlings SE, et al. Prevention of recurrent urinary tract infections in women: Antimicrobial and nonantimicrobial strategies. Infectious Disease Clinics of North America. 2014;28:135.
- Hooton TM, et al. Recurrent urinary tract infection in women. http://www.uptodate.com/home. Accessed April 20, 2015.
- Jepson RG. Cranberries for preventing urinary tract infections. Cochrane Database of Systematic Reviews. http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD001321.pub5/abstract. Accessed April 20, 2015.
- Cranberry. National Center for Complementary and Integrative Health. https://nccih.nih.gov/health/cranberry. Accessed April 20, 2015.
- Newman DK, et al. Office-based behavioral therapy for management of incontinence and other pelvic disorders. The Urologic Clinics of North America. 2013;40:613.
- Castle EP (expert opinion). Mayo Clinic, Phoenix/Scottsdale, Ariz. Nov. 1, 2016.
- Marnach ML (expert opinion). Mayo Clinic, Rochester, Minn. May 24, 2015.
- Juthani-Mehta M, et al. Effect of cranberry capsules on bacteriuria plus pyuria among older women in nursing homes. JAMA. In press. Accessed Oct. 31, 2016.