title: Occurrence of extended-spectrum beta-lactamase-producing Salmonella enterica in northern Spain with evidence of CTX-M-9 clonal spread among animals and humans.
abstract: Among the 1233 Salmonella enterica isolates obtained in two Spanish hospitals, five isolates (0.4%) (serovars: Virchow, four; Livingstone, one) had the phenotype of an extended-spectrum beta-lactamase (ESBL) producer. The genetic characterization of the ESBL of S. enterica Livingstone revealed a bla(SHV-2) gene. The bla(CTX-M-10) gene in a phage-related genetic environment was found in one S. enterica Virchow isolate, and the bla(CTX-M-9) gene within the In60 integron was found in the three remaining Virchow isolates. These three isolates presented indistinguishable or closely related pulsed-field gel electrophoresis patterns among themselves and also as compared with the two other bla(CTX-M-9)-containing isolates previously obtained from animals. ESBL production is an emerging mechanism of resistance in S. enterica in the two studied hospitals.
authors.affiliation: Area de Bioquímica y Biología Molecular, Universidad de La Rioja, Logroño, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Riaño
authors.forename: M
authors.initials: M
authors.lastname: García-Campello
authors.forename: Y
authors.initials: Y
authors.lastname: Sáenz
authors.forename: P
authors.initials: P
authors.lastname: Alvarez
authors.forename: L
authors.initials: L
authors.lastname: Vinué
authors.forename: M
authors.initials: M
authors.lastname: Lantero
authors.forename: M A
authors.initials: MA
authors.lastname: Moreno
authors.forename: M
authors.initials: M
authors.lastname: Zarazaga
authors.forename: C
authors.initials: C
authors.lastname: Torres
mesh_terms: D000818:Animals; D015373:Bacterial Typing Techniques; D016000:Cluster Analysis; D016172:DNA Fingerprinting; D004269:DNA, Bacterial / Q000235:genetics; D016521:Electrophoresis, Gel, Pulsed-Field; D005838:Genotype; D006801:Humans; D008826:Microbial Sensitivity Tests; D012480:Salmonella Infections / Q000382:microbiology*; D012481:Salmonella Infections, Animal / Q000382:microbiology*; D019779:Salmonella enterica / Q000187:drug effects* / Q000201:enzymology* / Q000235:genetics / Q000302:isolation & purification; D013030:Spain; D001618:beta-Lactamases / Q000096:biosynthesis* / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial; D001618:beta-Lactamases