How are Proteus UTIs diagnosed?

Updated: Mar 03, 2020
  • Author: Shirin A Mazumder, MD, FIDSA; Chief Editor: Michael Stuart Bronze, MD  more...
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UTIs in symptomatic patients have traditionally been defined by recovering bacteria in large numbers (ie, >100,000 colony-forming units [CFUs]/mL) on examination. Bacterial counts of less than 100,000 CFUs/mL may indicate infection in urine samples, especially if obtained directly from the ureters or renal pelvis, whereas specimens from suprapubic catheters usually have bacterial counts greater than 100,000 CFUs/mL. However, even small numbers of organisms may be of true clinical significance in symptomatic patients (eg, women with the urethral syndrome).

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