First characterization of inhibitor-resistant TEM (IRT) beta-lactamases in Klebsiella pneumoniae strains.

Antimicrobial Agents and Chemotherapy
J LemozyJ Sirot

Abstract

Two clinical strains of Klebsiella pneumoniae, TP 01 and TP 02, presented resistance to amoxicillin-clavulanate and were fully susceptible to cephalothin. These strains produced two beta-lactamases, SHV-1 and a TEM enzyme with a pI of 5.2. The previously described changes Arg-244-->Cys and Arg-244-->Ser in IRT-1 and IRT-2 (A. Belaaouaj, C. Lapoumeroulie, M. M. Caniça, G. Vedel, P. Nevot, R. Krishnamoorthy, and G. Paul, FEMS Microbiol. Lett. 120:75-80, 1994) were found in TEM enzymes from the TP 01 and TP 02 strains, respectively. This is the first report of inhibitor-resistant TEM (IRT) in species other than Escherichia coli from the family Enterobacteriaceae.

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Oct 8, 1999·Pharmacology & Therapeutics·Y YangD M Shlaes
Sep 14, 2002·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·John M QualeAdedeyo Adedeji
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