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. 1994 Dec;38(12):2838–2842. doi: 10.1128/aac.38.12.2838

Extended-spectrum beta-lactamases in clinical isolates of Enterobacter gergoviae and Escherichia coli in China.

Y Cheng 1, M Chen 1
PMCID: PMC188293  PMID: 7695270

Abstract

Resistance to ceftazidime, detected in isolates of Escherichia coli 5518 and Enterobacter gergoviae 3773 from our hospital, was transferred, together with resistance to aminoglycosides, trimethoprim, sulfonamide, and other beta-lactam antibiotics, by conjugation to E. coli JP559. Both E. coli transconjugants were resistant to ampicillin, all cephalosporins, and aztreonam but remained susceptible to cefoxitin and imipenem. The enzymes of the two transconjugant strains readily hydrolyzed cephalosporins in a spectrophotometric assay. Hybridization results suggested that the extended-spectrum beta-lactamase produced by E. coli 5518 was a non-TEM, non-SHV enzyme, the origin of which is currently unknown. The beta-lactamase produced by E. gergoviae 3773 was of the SHV type and was further proved to be SHV-2 by DNA sequencing. Thus, extended-spectrum beta-lactamases are occurring in China as well as in other parts of the world.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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