title: Prevalence and antimicrobial resistance in Campylobacter spp. isolated from retail chicken in two health units in Ontario.
abstract: Campylobacter is an important enteric pathogen of humans and can cause diarrhea, fever, and abdominal pain. Campylobacter infections have frequently been associated with the handling and consumption of raw and undercooked poultry. Antimicrobial resistance among Campylobacter strains is of concern in the treatment of campylobacteriosis in vulnerable populations. A 2-year multidisciplinary study was conducted in the Perth and Wellington-Dufferin-Guelph public health units in Ontario, Canada, to investigate the prevalence and antimicrobial resistance of Campylobacter spp. in retail chicken. Retail chicken samples were collected from randomly selected stores in these health units. Resulting Campylobacter isolates were tested for susceptibility to amoxicillin-clavulanic acid (AMC), ampicillin (AMP), chloramphenicol (CHL), ciprofloxacin (CIP), clindamycin (CLI), erythromycin (ERY), gentamicin (GEN), nalidixic acid (NAL), tetracycline (TCY), and trimethoprim-sulfamethoxazole (SXT) using the E test. The prevalence of Campylobacter in 1,256 retail chicken samples was 59.6%. Of these positive samples, 9% contained Campylobacter coli, 1% contained Campylobacter lari, and 90% contained Campylobacter jejuni. Of the chicken isolates that were resistant to one or more antimicrobial agents, 301 isolates (40%) were resistant to one agent, 374 (50%) were resistant to two, 39 (5%) were resistant to three, 20 (3%) were resistant to four, and 6 (1%) were resistant to five. Nine isolates (1%) were susceptible to all antimicrobial agents tested. All isolates were susceptible to AMC, CHL, and GEN. Less than 10% of isolates were resistant to NAL, CIP, CLI, ERY, and AMP. Resistance to TCY was common (56%). No isolates had a resistance pattern that included all three antimicrobials important in the treatment of human campylobacteriosis (CIP, ERY, and TCY); however, 24 isolates (3.2%) were resistant to at least two of these antimicrobials.
authors.affiliation: Population Medicine, University of Guelph, Guelph, Ontario, Canada. anne_deckert@phac-aspc.gc.ca
authors.forename: Anne
authors.initials: A
authors.lastname: Deckert
authors.forename: Alfonso
authors.initials: A
authors.lastname: Valdivieso-Garcia
authors.forename: Richard
authors.initials: R
authors.lastname: Reid-Smith
authors.forename: Susan
authors.initials: S
authors.lastname: Tamblyn
authors.forename: Patrick
authors.initials: P
authors.lastname: Seliske
authors.forename: Rebecca
authors.initials: R
authors.lastname: Irwin
authors.forename: Cate
authors.initials: C
authors.lastname: Dewey
authors.forename: Patrick
authors.initials: P
authors.lastname: Boerlin
authors.forename: Scott A
authors.initials: SA
authors.lastname: McEwen
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002167:Campylobacter / Q000187:drug effects* / Q000302:isolation & purification; D017000:Campylobacter coli / Q000187:drug effects / Q000302:isolation & purification; D016123:Campylobacter jejuni / Q000187:drug effects / Q000302:isolation & purification; D002645:Chickens / Q000382:microbiology*; D015169:Colony Count, Microbial; D024881:Drug Resistance, Bacterial; D024901:Drug Resistance, Multiple, Bacterial; D005506:Food Contamination / Q000032:analysis*; D006757:Hospital Units; D006801:Humans; D016867:Immunocompromised Host; D008826:Microbial Sensitivity Tests; D009864:Ontario / Q000453:epidemiology; D011202:Poultry Products / Q000382:microbiology; D015995:Prevalence; D012307:Risk Factors
chemical_list: D000900:Anti-Bacterial Agents