ABSTRACT:The emergence of inhibitor resistant beta-lactamase producing isolates might be related to the frequent use of beta-lactamase inhibitors in hospitals and general practice. During a routine identification and antibiogram of gram negative isolates by the Vitek 2 system, two urinary and one sputum isolates of inhibitor resistant beta-lactamases showing concordant result with the Kirby Bauer disk diffusion method were detected. Paucity of data regarding the occurrence of these enzymes in north-east India is the rationale for reporting these cases.
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