title: Detection of CMY-2, CTX-M-14, and SHV-12 beta-lactamases in Escherichia coli fecal-sample isolates from healthy chickens.
abstract: Genes encoding the CMY-2, CTX-M-14, and SHV-12 beta-lactamases were detected in three of five Escherichia coli isolates from fecal samples from healthy chickens which showed resistance or diminished susceptibility to extended-spectrum cephalosporins. A -42 mutation at the promoter region of the ampC gene was detected in the other two isolates.
authors.affiliation: Area de Bioquímica y Biología Molecular, Universidad de La Rioja, 26006 Logroño, Spain.
authors.forename: Laura
authors.initials: L
authors.lastname: Briñas
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: Moreno
authors.forename: Myriam
authors.initials: M
authors.lastname: Zarazaga
authors.forename: Concepción
authors.initials: C
authors.lastname: Porrero
authors.forename: Yolanda
authors.initials: Y
authors.lastname: Sáenz
authors.forename: María
authors.initials: M
authors.lastname: García
authors.forename: Lucas
authors.initials: L
authors.lastname: Dominguez
authors.forename: Carmen
authors.initials: C
authors.lastname: Torres
mesh_terms: D000818:Animals; D018550:Cephalosporin Resistance; D002511:Cephalosporins / Q000494:pharmacology; D002645:Chickens / Q000382:microbiology*; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004926:Escherichia coli / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics / Q000302:isolation & purification; D005243:Feces / Q000382:microbiology; D007527:Isoenzymes / Q000235:genetics; D008826:Microbial Sensitivity Tests; D016133:Polymerase Chain Reaction; D001618:beta-Lactamases / Q000235:genetics / Q000378:metabolism*
chemical_list: D002511:Cephalosporins; D004269:DNA, Bacterial; D007527:Isoenzymes; D001618:beta-Lactamases