title: Prevalence of carriage of Shiga toxin-producing Escherichia coli serotypes O157:H7, O26:H11, O103:H2, O111:H8, and O145:H28 among slaughtered adult cattle in France.
abstract: The main pathogenic enterohemorrhagic Escherichia coli (EHEC) strains are defined as Shiga toxin (Stx)-producing E. coli (STEC) belonging to one of the following serotypes: O157:H7, O26:H11, O103:H2, O111:H8, and O145:H28. Each of these five serotypes is known to be associated with a specific subtype of the intimin-encoding gene (eae). The objective of this study was to evaluate the prevalence of bovine carriers of these “top five” STEC in the four adult cattle categories slaughtered in France. Fecal samples were collected from 1,318 cattle, including 291 young dairy bulls, 296 young beef bulls, 337 dairy cows, and 394 beef cows. A total of 96 E. coli isolates, including 33 top five STEC and 63 atypical enteropathogenic E. coli (aEPEC) isolates, with the same genetic characteristics as the top five STEC strains except that they lacked an stx gene, were recovered from these samples.O157:H7 was the most frequently isolated STEC serotype. The prevalence of top five STEC (all serotypes included) was 4.5% in young dairy bulls, 2.4% in young beef bulls, 1.8% in dairy cows, and 1.0% in beef cows. It was significantly higher in young dairy bulls (P<0.05) than in the other 3 categories. The basis for these differences between categories remains to be elucidated. Moreover,simultaneous carriage of STEC O26:H11 and STEC O103:H2 was detected in one young dairy bull. Lastly, the prevalence of bovine carriers of the top five STEC, evaluated through a weighted arithmetic mean of the prevalence by categories, was estimated to 1.8% in slaughtered adult cattle in France.
authors.forename: Delphine
authors.initials: D
authors.lastname: Bibbal
authors.forename: Estelle
authors.initials: E
authors.lastname: Loukiadis
authors.forename: Monique
authors.initials: M
authors.lastname: Kérourédan
authors.forename: Franck
authors.initials: F
authors.lastname: Ferré
authors.forename: Françoise
authors.initials: F
authors.lastname: Dilasser
authors.forename: Carine
authors.initials: C
authors.lastname: Peytavin de Garam
authors.forename: Philippe
authors.initials: P
authors.lastname: Cartier
authors.forename: Eric
authors.initials: E
authors.lastname: Oswald
authors.forename: Emilie
authors.initials: E
authors.lastname: Gay
authors.forename: Frédéric
authors.initials: F
authors.lastname: Auvray
authors.forename: Hubert
authors.initials: H
authors.lastname: Brugère
mesh_terms: D000003:Abattoirs; D000818:Animals; D058070:Asymptomatic Diseases / Q000453:epidemiology*; D002353:Carrier State / Q000453:epidemiology / Q000382:microbiology*; D002417:Cattle / Q000382:microbiology*; D004197:Disease Reservoirs / Q000382:microbiology / Q000662:veterinary*; D029968:Escherichia coli Proteins / Q000235:genetics; D005260:Female; D005602:France / Q000453:epidemiology; D008297:Male; D008460:Meat / Q000382:microbiology; D015995:Prevalence; D022603:Shiga Toxins / Q000235:genetics; D054323:Shiga-Toxigenic Escherichia coli / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*
chemical_list: D029968:Escherichia coli Proteins; D022603:Shiga Toxins