1887

Abstract

Three clinical strains of (p168, p517 and p667) were collected in 2006 from three hospitals in Anhui Province (China). PCR and DNA sequencing revealed that p168 carried a novel extended-spectrum -lactamase (ESBL), which was designated CTX-M-87. The extended-spectrum -lactamase which was carried by p517 and p667 was previously named CTX-M-65. The deduced amino acid sequence of CTX-M-87, with pI 9.1, differed from that of CTX-M-14 by the substitutions Ala77→Val and Pro167→Leu. Like CTX-M-14, CTX-M-87 had a more potent hydrolytic activity against cefotaxime than against ceftazidime and had high affinity for cefuroxime and cefotaxime. These data show that mutations at position 167 in CTX-M do not always affect catalytic activity and substrate preference.

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2009-06-01
2020-08-08
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