Resistance pattern of MBL production E. Coli (A), K. pneumonia (B) and P. aeruginosa (C) strains against various antibiotics; R: Resistance; S: Sensitive; MBL: Metallo-β-lactamases; IPM: Imipenem; MEM: Meropenem; FEP: Cefepime; CIP: Ciprofloxacin; CAZ: Caftazidime; CTX: Cefotaxime; CRO: Ceftriaxone.