title: National prevalence of resistance to third-generation cephalosporins in Escherichia coli isolates from layer flocks in France.
abstract: Resistance of Escherichia coli to third-generation cephalosporin (3GC) in fecal samples representative of French egg production was studied. The susceptibility to cefotaxime of E. coli isolates obtained by culture on nonselective media was determined. Twenty-two nonsusceptible isolates were obtained (7.51%; 95% confidence interval, 4.49 to 10.54%), the majority of which came from young birds. Most isolates carried a blaCTX-M-1 group gene, and a few carried a blaCMY-2-like gene. Control of 3GC resistance in laying hens is needed.
authors.affiliation: ANSES, Ploufragan Laboratory, Ploufragan, France.
authors.forename: Claire
authors.initials: C
authors.lastname: Chauvin
authors.forename: Laetitia
authors.initials: L
authors.lastname: Le Devendec
authors.forename: Eric
authors.initials: E
authors.lastname: Jouy
authors.forename: Maena
authors.initials: M
authors.lastname: Le Cornec
authors.forename: Sylvie
authors.initials: S
authors.lastname: Francart
authors.forename: Corinne
authors.initials: C
authors.lastname: Marois-Créhan
authors.forename: Isabelle
authors.initials: I
authors.lastname: Kempf
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002439:Cefotaxime / Q000494:pharmacology; D002511:Cephalosporins / Q000494:pharmacology*; D002645:Chickens; D004926:Escherichia coli / Q000187:drug effects*; D005243:Feces / Q000382:microbiology; D005602:France; D008826:Microbial Sensitivity Tests
chemical_list: D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D002439:Cefotaxime
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