title: Antimicrobial susceptibility of hazard analysis critical control point Escherichia coli isolates from federally inspected beef processing plants in Alberta, Saskatchewan, and Ontario.
abstract: A survey to estimate the prevalence of antimicrobial resistance in Escherichia coli was conducted in 7 Canadian federally inspected processing plants during 2001. Escherichia coli isolates were recovered during routine hazard analysis critical control point sampling from beef carcasses and trim and subsequently tested for their antimicrobial susceptibility by using susceptibility panels. Of the 2653 isolates analyzed, 68% were sensitive to all 18 antimicrobials tested. For 14 of the 18 antimicrobials evaluated, the percentage of resistant isolates was < or = 1. Twenty-five percent of the isolates were resistant to tetracycline, 9% to sulfamethoxazole, 7% to streptomycin, and 3% to ampicillin. Multiple resistance was found in 12% of the isolates, with 7% showing resistance to 2 antimicrobials, 2% to 3 antimicrobials, 2% to 4 antimicrobials, and 1% to 5 or more antimicrobials. Forty-five different antimicrobial resistance patterns were observed. The reasons for the development of the antimicrobial resistance were not investigated in this study. This study was useful as a pilot to help to develop a national antimicrobial resistance surveillance program in Canada. This study indicates that laboratory standardization is possible for consistent results across the country and that the indicator organism, E. coli, is fairly easy to obtain for surveillance but Salmonella are not, due to their low prevalence in beef.
authors.affiliation: Dr. Joyce Van Donkersgoed Veterinary Services Inc., 11 Bruns Road, Lacombe, Alberta T4L 1P1.
authors.forename: Joyce
authors.initials: J
authors.lastname: Van Donkersgoed
authors.forename: Ken
authors.initials: K
authors.lastname: Manninen
authors.forename: Andy
authors.initials: A
authors.lastname: Potter
authors.forename: Scott
authors.initials: S
authors.lastname: McEwen
authors.forename: Valerie
authors.initials: V
authors.lastname: Bohaychuk
authors.forename: Sandy
authors.initials: S
authors.lastname: Klashinsky
authors.forename: Anne
authors.initials: A
authors.lastname: Deckert
authors.forename: Rebecca
authors.initials: R
authors.lastname: Irwin
mesh_terms: D000416:Alberta; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002417:Cattle / Q000382:microbiology*; D002418:Cattle Diseases / Q000453:epidemiology / Q000382:microbiology; D024881:Drug Resistance, Bacterial; D004926:Escherichia coli / Q000187:drug effects* / Q000302:isolation & purification; D004927:Escherichia coli Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary; D005525:Food-Processing Industry; D008460:Meat / Q000382:microbiology*; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D009864:Ontario; D015995:Prevalence; D012525:Saskatchewan
chemical_list: D000900:Anti-Bacterial Agents