title: Diversity of genetic environment of bla(CTX-M) genes.
abstract: Twenty-four non-clonally related enterobacterial isolates producing the emerging CTX-M-type extended-spectrum beta-lactamases were recovered from several countries including France, India, Poland, and Turkey. They had been isolated from 2000 to 2003. beta-Lactamases CTX-M-2, CTX-M-3, CTX-M-10, CTX-M-14 and CTX-M-15 were identified. Most of the isolates produced beta-lactamase CTX-M-15. Insertion sequence ISEcp1 was found upstream of bla(CTX-M-3), bla(CTX-M-10), bla(CTX-M-14) and bla(CTX-M-15) genes. A sequence similar to the inverted right repeat of ISEcp1 was identified downstream of bla(CTX-M-3), bla(CTX-M-10) and bla(CTX-M-15) genes suggesting the mobilization of these beta-lactamase genes by transposition events. In addition, Orf513 was identified upstream of the bla(CTX-M-2) gene. This work further underlined widespread of bla(CTX-M-15) gene associated with ISEcp1.
authors.affiliation: Service de Bactériologie-Virologie, Hôpital de Bicêtre - CHU Paris-Sud, Assistance Publique/Hôpitaux de Paris, Facultéde Médecine Paris-Sud, 78, rue du General Leclerc, 94275 Le Kremlin-Bicêtre Cedex, France.
authors.forename: Marie-Frédérique
authors.initials: MF
authors.lastname: Lartigue
authors.forename: Laurent
authors.initials: L
authors.lastname: Poirel
authors.forename: Patrice
authors.initials: P
authors.lastname: Nordmann
mesh_terms: D001483:Base Sequence; D003001:Cloning, Molecular; D017931:DNA Primers; D004754:Enterobacter / Q000201:enzymology / Q000235:genetics* / Q000302:isolation & purification; D014644:Genetic Variation; D006801:Humans; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D017931:DNA Primers; D001618:beta-Lactamases