This situation prompts early and accurate detection of MBL producers. Hence the present study was done to phenotypically evaluate the prevalence of MBL production among 235 clinical isolates of Pseudomonas aeruginosa (183) and Acinetobacter species (52). The antimicrobial susceptibility testing was done by Kirby Bauer disk diffusion method. | Phenotypic Evaluation of Prevalence of Metallo-Beta-Lactamase MBL Production among Clinical Isolates of pseudomonas aeruginosa and acinetobacter species in a tertiary care hospital of north India