The risk of UTI after a kidney transplantation is higher than in the general population. MDR bacteria, such as extended spectrum betalactamase (ESBL)-producing enterobacteriaceae or MDR Pseumomoas aeruginosa are emerging threats due to antibiotic selective pressure. Epidemiological data are mostly data from hospital laboratories that do not show a complete overview of the current situation. In addition, the different centers which participated to this study received before the beginning of the study a protocol to avoid carbapenem use. The main objective of this study is to assess the prevalence of MDR bacteria in an adult population of KIT recipients. Through this study, the management of UTI in KIT recipients will be improved. Data on bacteria or yeasts responsible for UTI (identification, resistance profile), antibiotic use, patients' outcome, and graft outcome will be collected.