Beta-lactamases of Kluyvera ascorbata, probable progenitors of some plasmid-encoded CTX-M types.
نویسندگان
چکیده
Kluyvera ascorbata produces a beta-lactamase that results in an atypical susceptibility pattern, including low-level resistance to penicillins, cephalothin, and cefuroxime, but this resistance is reversed by clavulanate. Ten nucleotide sequences of the corresponding gene, bla(KLUA), were obtained and were found to have minor variations (96 to 100%). Otherwise, bla(KLUA) was found to be similar (95 to 100%) to some plasmid-encoded CTX-M-type beta-lactamases. Finally, mobilization of bla(KLUA) on a plasmid was found to be mediated probably by a genetic mobile element like ISEcp1.
منابع مشابه
-Lactamases of Kluyvera ascorbata, Probable Progenitors of Some Plasmid-Encoded CTX-M Types
Kluyvera ascorbata produces a -lactamase that results in an atypical susceptibility pattern, including lowlevel resistance to penicillins, cephalothin, and cefuroxime, but this resistance is reversed by clavulanate. Ten nucleotide sequences of the corresponding gene, blaKLUA, were obtained and were found to have minor variations (96 to 100%). Otherwise, blaKLUA was found to be similar (95 to 10...
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متن کاملEpidemiology and genetics of CTX-M extended-spectrum β-lactamases in Gram-negative bacteria
CTX-M enzymes, the plasmid-mediated cefotaximases, constitute a rapidly growing family of extended-spectrum β-lactamases (ESBLs) with significant clinical impact. CTX-Ms are found in at least 26 bacterial species, particularly in Escherichia coli, Klebsiella pneumoniae and Proteus mirabilis. At least 109 members in CTX-M family are identified and can be divided into seven clusters based on thei...
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عنوان ژورنال:
- Antimicrobial agents and chemotherapy
دوره 46 9 شماره
صفحات -
تاریخ انتشار 2002