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Major bacterial infections following liver transplantation: a prospective study
C Lumbreras1, M Lizasoain, E Moreno
1Infectious Diseases and Microbiology Department, Hospital 12 De Octubre, Madrid, Spain.
Abstract:
The incidence and characteristics of major bacterial infections were studied prospectively in 50 consecutive adult patients who underwent liver transplantation (LT). All patients received the same protocol of immunosuppression, bowel decontamination, antibiotics prophylaxis, and follow-up. Thirty-two patients (64%) had at least one episode of major bacterial infection. One death was directly related to a bacterial infection, accounting for 13% of postoperative mortality. The most critical period for infection was the first 2 months after surgery, when 69% of the infections occurred. The most frequent clinical presentations were bacteremia, pneumonia and abdominal abscesses. Eighty percent of the bacteremias had an identifiable source, the most frequent being intravascular catheters. Gram-positive microorganisms (69%) predominated over gram-negative rods (26%) and anaerobes (5%). The use of selective bowel decontamination (SBD) with norfloxacin may explain this predominance. Major bacterial infections are an important source of morbidity and mortality after LT. Efforts to prevent these infections and to determine their source and specific treatment, will improve the management and the outcome of these patients in the future.
Insights
Major bacterial infections are common after liver transplantation (LT), affecting 64% of patients. Gram-positive bacteria were the most frequent cause, highlighting the need for targeted prevention and treatment strategies.
Area of Science:
- Infectious Diseases
- Transplantation Medicine
- Bacteriology
Background:
- Liver transplantation (LT) is a complex procedure associated with significant risks.
- Postoperative infections, particularly bacterial infections, contribute substantially to morbidity and mortality in LT recipients.
Purpose of the Study:
- To prospectively investigate the incidence and characteristics of major bacterial infections following liver transplantation.
- To identify the primary sources, causative microorganisms, and clinical presentations of these infections.
Main Methods:
- Prospective study of 50 consecutive adult liver transplant patients.
- Standardized immunosuppression, antibiotic prophylaxis, and selective bowel decontamination (SBD) protocols were used.
- Detailed monitoring for infectious episodes, including clinical presentation, microbiology, and outcomes.
Main Results:
- 64% of patients experienced at least one major bacterial infection within the first two months post-LT.
- Bacteremia, pneumonia, and abdominal abscesses were the most common presentations.
- Gram-positive bacteria (69%) predominated, with intravascular catheters frequently identified as the source of bacteremia.
- One death was directly attributed to bacterial infection, representing 13% of postoperative mortality.
Conclusions:
- Major bacterial infections pose a significant threat to liver transplant recipients, impacting both morbidity and mortality.
- The predominance of Gram-positive infections may be linked to selective bowel decontamination (SBD) with norfloxacin.
- Improved strategies for infection prevention, source identification, and targeted treatment are crucial for enhancing patient outcomes.