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FEMS Microbiol Lett. 2001 Jul 24;201(2):237-41.

Plasmid-mediated extended-spectrum beta-lactamase (CTX-M-3 like) from India and gene association with insertion sequence ISEcp1.

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1
Service de Bacteriologie-Virologie, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, Faculté de Médicine Paris-Sud, France.

Abstract

Six non-clonally related enterobacterial isolates producing a same extended-spectrum beta-lactamase CTX-M-15 were isolated in 1999 from patients hospitalized in a New Delhi hospital. CTX-M-15 differed from CTX-M-3 by an asparagine to glycine substitution in position ABL238. Its gene was located on large plasmids varying in size. In each case, a same insertion sequence ISEcp1 was identified upstream of the 5' end of bla(CTX-M-15). Typical -35 and -10 promoter sequences of Enterobacteriaceae were identified in the 3' end of ISEcp1. The location of ISEcp1 upstream of plasmid-mediated CTX-M-type beta-lactamase genes may contribute to their spread or/and their expression.

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