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Updated: Sep 21, 2025

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Pseudomonal Diabetic Foot Infections: Vive la Différence?

Ilker Uçkay1,2,3, Dan Lebowitz2, Benjamin Kressmann1

  • 1Clinical Pathway for Diabetic Foot Infections, Geneva University Hospitals, Geneva, Switzerland.

Mayo Clinic Proceedings. Innovations, Quality & Outcomes
|May 31, 2022
PubMed
Summary

Diabetic foot infections (DFIs) caused by Pseudomonas aeruginosa show higher initial failure rates but similar recurrence compared to other pathogens. Treatment regimens for pseudomonal DFIs do not need to differ from nonpseudomonal DFIs, focusing on active antibiotic selection.

Keywords:
CI, confidence intervalDFI, diabetic foot infectionDFO, diabetic foot osteomyelitisHR, hazard ratioIDSA, Infectious Diseases Society of AmericaIQR, interquartile rangeIWGDF, International Working Group on the Diabetic Foot

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Area of Science:

  • Infectious Diseases
  • Diabetology
  • Microbiology

Background:

  • Diabetic foot infections (DFIs) are a significant complication of diabetes mellitus.
  • Pseudomonas aeruginosa is a common pathogen in DFIs, potentially impacting treatment outcomes.

Purpose of the Study:

  • To assess the clinical outcomes of DFIs specifically caused by Pseudomonas aeruginosa.
  • To compare the treatment response and recurrence rates of pseudomonal DFIs versus nonpseudomonal DFIs.

Main Methods:

  • Prospective analysis of 1018 DFI cases from April 2013 to July 2016.
  • Comparison of outcomes between patients with Pseudomonas infections and those with other pathogens.
  • Inclusion of osteomyelitis and soft tissue infection cases.

Main Results:

  • Pseudomonas aeruginosa was identified in 10% of DFIs (104/1018 cases).
  • Initial clinical failure rates were higher in pseudomonal DFIs (35%) compared to nonpseudomonal DFIs (24%, P=.02).
  • Multivariate analysis revealed no significant difference in recurrence rates between pseudomonal and nonpseudomonal DFIs (HR=1.0).

Conclusions:

  • Pseudomonal DFIs do not require a different therapeutic regimen than nonpseudomonal DFIs, beyond selecting an active antibiotic.
  • Treatment duration or specific antibiotic combinations did not significantly impact outcomes for pseudomonal DFIs.
  • Focusing on organism-specific antibiotic activity is key for managing pseudomonal DFIs effectively.