How to detect bacterial contamination prior to transplantation

Area of Science:

• Nephrology
• Microbiology
• Transplant Surgery

Background:

• Kidney transplantation mortality is often linked to infections and gastrointestinal complications.
• Contaminated kidney grafts can lead to severe recipient complications, necessitating multiple surgeries.
• Standard practice involves perfusate sampling for microbiological examination to detect contamination.

Purpose of the Study:

• To evaluate the utility of routine perfusate culture in kidney transplantation.
• To determine the incidence of microbial contamination in kidney perfusate.
• To assess the impact of early antibiotic therapy based on perfusate culture results on clinical outcomes.

Main Methods:

• Microbiological examination of kidney perfusate using blood culture media.
• Incubation of perfusate samples during cold ischemic time (CIT) of 24-30 hours.
• Analysis of microbial isolates and correlation with clinical infection rates.

Main Results:

• Microbiologic examination of perfusate was positive in 28% of 145 donor nephrectomies.
• Most isolated germs (80%) were non-pathogenic skin flora.
• Despite detecting pathogenic bacteria, no clinical infections occurred in 114 transplanted patients receiving targeted antibiotics.

Conclusions:

• Routine perfusate culture provides timely information on graft contamination.
• Early initiation of first-choice antibiotic therapy based on perfusate culture results is effective.
• Targeted antibiotic strategies are superior to general antibiotic prophylaxis in kidney transplantation.