Klebsiella pneumoniae strains carrying the chromosomal SHV-11 -lactamase gene produce the plasmid-mediated SHV-12 extended-spectrum -lactamase more frequently than those carrying the chromosomal SHV-1 -lactamase gene
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چکیده
منابع مشابه
Extended-spectrum beta-lactamase genes of Klebsiella pneumoniae strains in Taiwan: recharacterization of shv-27, shv-41, and tem-116.
Klebsiella pneumoniae causing primary liver abscess (PLA) is emerging. This study identified the beta-lactamases genes of K. pneumoniae isolates in Taiwan. The susceptibilities of beta-lactam antibiotics of 30 K. pneumoniae strains associated with primary liver abscess and 30 noninvasive strains were analyzed. The beta-lactamase genes of randomly selected 24 strains from community-acquired infe...
متن کاملStudy of a Natural Mutant SHV-Type β-Lactamase, SHV-104, from Klebsiella pneumoniae
Klebsiella pneumoniae ML2011, a multiresistant isolate, was isolated from the Military Hospital of Tunis (Tunisia). The determination of the minimal inhibitory concentrations exhibited by K. pneumoniae ML2011 was performed by Etest. The crude extract of the isolates contains four different β -lactamases with pI 5.5, 7.3, 7.6, and 8.6. Only the β -lactamases with pI 7.3 and pI 8.6 were transferr...
متن کاملBiochemical characterization of SHV-55, an extended-spectrum class A beta-lactamase from Klebsiella pneumoniae.
We biochemically characterized the Klebsiella pneumoniae extended-spectrum SHV-55 enzyme carrying the amino acid substitutions Tyr73Phe (as in SHV-28) and Gly2383Ser and Glu2403Lys (both found in SHV-5) identified in a previous study (5). The SHV-55 extended-spectrum -lactamase differed from SHV-5 only in the signal peptide region (1). The blaSHV-55 gene was obtained as described by Mendonça et...
متن کاملCharacterization of the inhibitor-resistant SHV β-lactamase SHV-107 in a clinical Klebsiella pneumoniae strain coproducing GES-7 enzyme.
The clinical Klebsiella pneumoniae INSRA6884 strain exhibited nonsusceptibility to all penicillins tested (MICs of 64 to >2,048 μg/ml). The MICs of penicillins were weakly reduced by clavulanate (from 2,048 to 512 μg/ml), and tazobactam restored piperacillin susceptibility. Molecular characterization identified the genes bla(GES-7) and a new β-lactamase gene, bla(SHV-107), which encoded an enzy...
متن کاملFirst Outbreak of Multidrug-Resistant Klebsiella pneumoniae Producing both SHV-12-Type Extended-Spectrum β-Lactamase and DHA-1-Type AmpC β-Lactamase at a Korean Hospital
PURPOSE Coexistence of different classes of beta-lactamases in a single bacterial isolate may pose diagnostic and therapeutic challenges. We investigated a spread of Klebsiella pneumoniae isolates co-producing an AmpC beta-lactamase and an extended-spectrum beta-lactamase (ESBL) in a university hospital. MATERIALS AND METHODS Over a three-month period, a total of 11 K. pneumoniae isolates, wh...
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ژورنال
عنوان ژورنال: Journal of Antimicrobial Chemotherapy
سال: 2006
ISSN: 0305-7453,1460-2091
DOI: 10.1093/jac/dkl115