Definition

Early infection was defined as an infection occurring in the first three months after liver transplantation. The standards used to define and classify infections in our study were proposed by the Centers for Disease Control and Prevention (Horan et al., 2008). The infection was defined based on combining the positive culture of different samples with the positive clinical manifestations. The samples were carried out for clinical bacteria culture, including blood, sputum (or other respiratory secretions), urine, ascites samples, organ preservation solution, catheter drainage fluid, and lavage fluid. CRKP was defined as insensitivity to at least one carbapenems, with a minimum inhibitory concentration ≥2 ug/mL for ertapenem or ≥4 ug/mL for imipenem or meropenem (Clinical and Laboratory Standards Institute, 2017).