Incidence and antimicrobial profile of extended-spectrum β-lactamase producing gram-negative bacterial isolates: An in-vitro and statistical analysis

Objectives: There is an extensive incidence of extended-spectrum beta-lactamases (ESBLs), principally in the hospital environment across the world. The present study was designed to discover the frequency of ESBL-production among the clinical isolates of Escherichia coli, Klebsiella pneumonia, and Pseudomonas aeruginosa. The study also focused on determining their liability to the selected antimicrobials.

Methods: Two hundred ten (210) clinical specimens were tested for the occurrence of ESBL using the double-disc synergy test. The molecular, physicochemical, absorption, distribution, metabolism, excretion, and toxicity were checked through an online server.

Results: Among the screened clinical isolates, E. coli (n=44), K. pneumonia (n=34) and P. aeruginosa (n=14) were ESBL markers. The ESBL producing isolates exhibited co-resistance to diverse categories of antibiotics. It was observed that all the ESBL-producing isolates were sensitive towards imipenem and faropenem with minimal proportion of resistance.

Conclusion: The imipenem and faropenem can be recommended as the drugs of selection due to a lesser amount of resistance as compared to other antibiotics in this study.