Carbapenem resistance due to metallo beta lactamases (MBLs) has grown as a health care problem in recent decades. The present study has investigated the antibiotic susceptibility patterns and screening of MBLs producing P. aeruginosa isolates at two university hospitals in northwest of Iran. Furthermore, serotyping, PFGE and MLST were used for studying the clonal relationship among the isolates. In brief our findings showed that blaVIM and blaIMP types MBLs are common in our area. All MBLs producing isolates were non-susceptible to imipenem, majority of them belonged to MDR phenotype and O10...