Expansion of highly stable bla β-lactamase family within diverse host range among nosocomial isolates of Gram-negative bacilli within a tertiary referral hospital of Northeast India.

Background: The current study reports dissemination of highly stable bla family of beta lactamases among diverse group of nosocomial isolates of Gram-negative bacilli within a tertiary referral hospital of the northern part of India.

Methods: In the current study, a total number of 590 Gram negative isolates were selected for a period of 1 year (i.e.