Abstract
Background: To determine the prevalence of antimicrobial-resistant genes in carbapenem-resistant Escherichia coli (CRECO). Methods: A total of290 carbapenem-resistant bacteria were collected from tertiary care hospitals in Lahore (Pakistan). These isolates were confirmed by VITEK 2and matrix-assisted laser desorption/ionization time of flight. The minimum inhibitory concentration was performed by VITEK 2. Sequence typing, resistant geneidentification, DNA hybridization and replicate typing were also performed. Results: 33 out of290 (11.3%) were CRECO and carried blaNDM; 69, 18and 12% were NDM-1, NDM-5and NDM-7, respectively, with 100% resistance to β-lactams and β-lactam inhibitors. ST405 and ST468 were mostly identified. NDM-ECO carried approximately 50-450kb of plasmids and 16 (55%) were associated with IncA/C. Conclusion: NDM-1-producing E. coli are highly prevalent in clinical settings.
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