Plasmid-mediated, carbapenem-hydrolysing β-lactamase, KPC-2, in Klebsiella pneumoniae isolates

Ellen Smith Moland, Nancy D. Hanson, Vicki L. Herrera, Jennifer A. Black, Thomas J. Lockhart, Ashfaque Hossain, Judith A. Johnson, Richard V. Goering, Kenneth S. Thomson

Research output: Contribution to journalArticle

182 Scopus citations

Abstract

Four isolates of Klebsiella pneumoniae obtained from patients at a Maryland medical centre exhibited reduced susceptibility to carbapenems and were found to produce the novel, class A, plasmid-mediated, carbapenem-hydrolysing enzyme, KPC-2. This enzyme has 99% identity with the plasmid-mediated, carbapenem-hydrolysing enzyme KPC-1, reported previously in a North Carolina K. pneumoniae isolate. The KPC-2-producing isolates were either susceptible or intermediate to imipenem and meropenem, unlike the KPC-1-producing isolate, which was resistant to these agents. Detection of KPC-2 may be a problem for clinical laboratories because in this study it was associated with positive extended-spectrum β-lactamase (ESBL) confirmation tests (clavulanate-potentiated activities of ceftriaxone, ceftazidime, cefepime and aztreonam). Therefore, a failure to recognize the significance of reduced carbapenem susceptibility in the isolates that remained susceptible to imipenem or meropenem could have resulted in the isolates being incorrectly identified as ESBL producers.

Original languageEnglish
Pages (from-to)711-714
Number of pages4
JournalJournal of Antimicrobial Chemotherapy
Volume51
Issue number3
DOIs
StatePublished - Mar 1 2003

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Microbiology

Fingerprint Dive into the research topics of 'Plasmid-mediated, carbapenem-hydrolysing β-lactamase, KPC-2, in Klebsiella pneumoniae isolates'. Together they form a unique fingerprint.

  • Cite this

    Moland, E. S., Hanson, N. D., Herrera, V. L., Black, J. A., Lockhart, T. J., Hossain, A., Johnson, J. A., Goering, R. V., & Thomson, K. S. (2003). Plasmid-mediated, carbapenem-hydrolysing β-lactamase, KPC-2, in Klebsiella pneumoniae isolates. Journal of Antimicrobial Chemotherapy, 51(3), 711-714. https://doi.org/10.1093/jac/dkg124