4.7 Article

KHM-1, a Novel Plasmid-Mediated Metallo-β-Lactamase from a Citrobacter freundii Clinical Isolate

Journal

ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 52, Issue 11, Pages 4194-4197

Publisher

AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.01337-07

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Funding

  1. Ministry of Health, Labor and Welfare of Japan [H18-Shinko-011, H19-Shinko-011, H20-Shinko-011]

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A novel gene, bla(KHM-1), encoding a metallo-beta-lactamase, KHM-1, was cloned from a clinical isolate of Citrobacter freundii resistant to most beta-lactam antibiotics. Escherichia coli expressing bla(KHM-1) was resistant to all broad-spectrum beta-lactams except for monobactams and showed reduced susceptibility to carbapenems. Recombinant KHM-1 exhibited EDTA-inhibitable hydrolytic activity against most beta-lactams, with an overall preference for cephalosporins.

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