ESBL-producing E. coli and K. pneumoniae: prevalence and antimicrobial susceptibility

Giuseppe Miragliotta; Anna Di Taranto; Rossella De Nittis; Raffaele Antonetti; Raffaele Del Prete; Adriana Mosca

doi:10.4081/mm.2009.2530

ESBL-producing E. coli and K. pneumoniae: prevalence and antimicrobial susceptibility

https://doi.org/10.4081/mm.2009.2530

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Vol. 24 No. 3 (2009)

Submitted: 17 February 2014
Accepted: 17 February 2014

Published: 30 September 2009

E. coli, K. pneumoniae, ESBL, sensibilità antibiotica

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Infections caused by extended-spectrum beta-lactamase (ESBL) producing E. coli and K. pneumoniae limit therapeutical options.The objective of this study was to evaluate the activity of ciprofloxacin, imipenem, amikacin and piperacillin/tazobactam against ESBL-producing E. coli and K. pneumoniae strains isolated from patients admitted to Ospedali Riuniti, Foggia, over the period January-December 2007. A total of 1013 E. coli and 146 K. pneumoniae were isolated from various clinical specimens. 111/1013 (10.9%) and 24/146 (16.4%) were confirmed as ESBL-producing strains by both the Phoenix system (Becton & Dickinson) and the E-test (bioMérieux, Italia). Both the ESBL producing enterobacteria showed a high degree resistance to ciprofloxacin; in addition, K. pneumoniae exhibited resistance also to piperacillin/tazobactam. Imipenem was the most effective antibiotic with the exception of one strain ESBL-positive K. pneumoniae. A similar pattern was showed by amikacin. In view of the increasing prevalence of ESBL strains it appears important a continuous antimicrobial monitoring.

Miragliotta, G., Di Taranto, A., De Nittis, R., Antonetti, R., Del Prete, R., & Mosca, A. (2009). ESBL-producing E. coli and K. pneumoniae: prevalence and antimicrobial susceptibility. Microbiologia Medica, 24(3). https://doi.org/10.4081/mm.2009.2530