Cloudy or Sloughy Urine in Diabetic Patients with Indwelling Catheters

Understanding the Clinical Significance

The Infectious Diseases Society of America (IDSA) explicitly states that observations of cloudy or smelly urine by themselves should not be interpreted as indications of symptomatic infection in patients with indwelling catheters 1
Cloudy urine in catheterized patients—with or without diabetes—is extremely common and has no diagnostic value for distinguishing infection from colonization 1

Fever (temperature >38°C or >100.4°F) without other identifiable source is a sign of true infection 1, 3
Dysuria (pain with urination—though this may be difficult to assess with indwelling catheter) is a sign of true infection 2
Suprapubic tenderness or costovertebral angle pain is a sign of true infection 3
Altered mental status in elderly patients (though this is nonspecific) is a sign of true infection 1
Rigors, hypotension, or signs of sepsis are signs of true infection 3

The IDSA provides a strong recommendation against screening for or treating asymptomatic bacteriuria in patients with indwelling catheters, regardless of diabetes status 3
The American College of Physicians recommends assessing for systemic symptoms of infection (fever, altered mental status, hemodynamic instability) 3
Removing the catheter as soon as medically feasible can clear bacteriuria in approximately 40% of patients 3
Sending urine culture only if symptomatic infection is suspected based on clinical criteria is recommended 2
Maintaining proper catheter care, including a closed drainage system, keeping the bag below bladder level, and minimizing disconnections, is crucial 4

Diabetic women have 2-5 times higher prevalence of asymptomatic bacteriuria than non-diabetic women 1
Asymptomatic bacteriuria (including cloudy urine) should still not be treated in diabetic patients with catheters 1, 3, 2