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Updated: Jan 21, 2026

Normothermic Ex Vivo Kidney Perfusion for the Preservation of Kidney Grafts prior to Transplantation
Published on: July 15, 2015
Microbiological epidemiology of preservation fluids in transplanted kidney: a nationwide retrospective observational
A Corbel1, M Ladrière1, N Le Berre1
1Nephrology Dialysis Transplantation Department, University of Lorraine, CHRU-Nancy, Nancy, France.
Objectives:
Kidney transplant recipients are at high-risk for donor-derived infections in the early post-transplant period. Transplant preservation fluid (PF) samples are collected for microbiological analysis. In case of positive PF cultures, the risk for the recipient is unknown and there is no consensus for prescribing prophylactic antibiotics. This nationwide observational study aimed to determine the epidemiology of bacterial and fungal agents in kidney transplant PF cultures and identify risk factors associated with positive PF cultures.
Methods:
We performed a retrospective observational study on the following data collected from a national database between October 2015 and December 2016: characteristics of donor, recipient, transplantation, infection in donor and PF microbiological data.
Results:
Of 4487 kidney transplant procedures, including 725 (16.2%, 725/4487) from living donors, 20.5% had positive PF cultures (living donors: 1.8%, 13/725; deceased donors: 24.1%, 907/3762). Polymicrobial contamination was found in 59.9% (485/810) of positive PF cultures. Coagulase-negative staphylococci (65.8%, 533/810) and Enterobacteriaceae (28.0%, 227/810) were the most common microorganisms. Factors associated with an increased risk of positive PF cultures in multivariable analysis were (for deceased-donor kidney transplants): intestinal perforation during procurement (OR 4.4, 95% CI 2.1-9.1), multiorgan procurement (OR 1.4, 95% CI 1.1-1.7) and en bloc transplantation (OR 2.5, 95% CI 1.3-4.9). Use of perfusion pump and donor antibiotic therapy were associated with a lower risk of positive PF cultures (OR 0.4, 95% CI 0.3-0.5 and OR 0.6, 95% CI 0.5-0.7, respectively).
Conclusion:
In conclusion, 24% of deceased-donor PF cultures were positive, and PF contamination during procurement seemed to be the major cause.
Insights
Positive kidney transplant preservation fluid (PF) cultures are common, especially from deceased donors, often due to contamination during procurement. This highlights the need for improved donor management to reduce infection risks for recipients.
Area of Science:
- Transplantation immunology
- Microbiology
- Infectious diseases
Background:
- Kidney transplant recipients face high risks of donor-derived infections early post-transplant.
- Preservation fluid (PF) cultures are used for microbiological analysis, but the risk of positive cultures is not well understood.
- There is no established consensus on prophylactic antibiotic use following positive PF cultures.
Purpose of the Study:
- To determine the epidemiology of bacterial and fungal agents in kidney transplant PF cultures.
- To identify risk factors associated with positive PF cultures in kidney transplantation.
- To inform clinical practice regarding donor-derived infections in kidney transplant recipients.
Main Methods:
- Retrospective observational study using a national database.
- Data collected from October 2015 to December 2016.
- Analysis included donor, recipient, transplantation characteristics, donor infections, and PF microbiological data.
Main Results:
- 20.5% of kidney transplants had positive PF cultures, with higher rates in deceased donors (24.1%) vs. living donors (1.8%).
- Coagulase-negative staphylococci and Enterobacteriaceae were the most frequent microorganisms; 59.9% of positive cultures showed polymicrobial contamination.
- Risk factors for positive PF cultures in deceased-donor transplants included intestinal perforation, multiorgan procurement, and en bloc transplantation; perfusion pump use and donor antibiotics reduced risk.
Conclusions:
- Approximately 24% of deceased-donor PF cultures were positive, suggesting procurement contamination as a primary cause.
- Understanding these epidemiological factors is crucial for managing infection risk in kidney transplant recipients.
- Further research may refine strategies for preventing donor-derived infections.
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