Multidrug-Resistant Infections After Liver Transplantation, Etiology and Risk Factors: A Single-Center Experience

Objectives: Patients undergoing liver transplant are at an increased risk of morbidity and mortality due to the development of infections. We aimed to evaluate the risk factors affecting the incidence of infectious diseases after liver transplant and to present the epidemiological data. Materials and Methods: We investigated patients aged >= 18 years who underwent liver transplant between 2012 and 2020 at our center. We collected infections, causative microorganisms, and antibacterial resistance patterns seen during the first 6 months posttransplant. Risk factors affecting the development of infectious diseases were also analyzed and evaluated. Results: Of 112 patients included in our study, 76 (67.9%) were men, and the median age was 50 years (range, 20-66 years). Within month 1 and month 6 after transplant, at least 1 episode of infection occurred in 67 (59.8%) and 80 (71.4%) patients, respectively. Bacterial infections were the most common type (n = 78, 95.1%), followed by fungal (n = 2, 2.4%) and viral (n = 2, 2.4%) infections. The rate of multidrug resistance in bacterial infections was high (n = 38, 52.7%) and was also a risk factor for mortality in the first 6 months after transplant (P <.001). Pretransplant values of international normalized ratio, creatinine, bilirubin, and posttransplant intensive care unit stay, as well as the presence of encephalopathy, were shown to increase the risk of infection after transplant. Conclusions: Multidrug-resistant bacterial infections are a significant risk factor for mortality in liver transplant patients. Many risk factors that contribute to the development of infections after transplant have been included in prognostic scoring systems of liver failure. Consequently, the severity of end- stage liver failure is directly related to the risk of posttransplant infections.