Postoperative urinary infections caused by Escherichia coli

Area of Science:

• Microbiology
• Infectious Diseases
• Urology

Background:

• Post-operative urinary tract infections (UTIs) are a significant clinical concern.
• The role of endogenous bacterial flora in the development of UTIs requires further elucidation.

Purpose of the Study:

• To investigate the origin of Escherichia coli (E. coli) causing UTIs in patients undergoing surgery and catheterization.
• To determine the association between pre-operative rectal and vaginal E. coli strains and post-operative UTIs.

Main Methods:

• Serological and biochemical classification of E. coli isolates.
• Sampling of rectal and vaginal flora from patients before and after surgery.
• Monitoring for the development of UTIs post-operation.

Main Results:

• Thirteen out of twenty (13/20) post-operative UTIs were attributed to E. coli strains.
• These causative E. coli strains were previously identified in the rectum and/or vagina of the same patients prior to surgery.
• This suggests a common source for the infection.

Conclusions:

• The pre-operative presence of specific E. coli types in the rectal and vaginal flora is a significant risk factor for developing post-operative UTIs.
• Understanding these endogenous reservoirs can inform preventative strategies for catheter-associated UTIs.