Prevalence and Characterization of <i>Campylobacter</i> in Bile from Bovine Gallbladders

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  • Sasaki Yoshimasa
    Division of Biomedical Food Research, National Institute of Health Sciences
  • Iwata Taketoshi
    Division of Pathology and Pathophysiology, Hokkaido Research Station, National Institute of Animal Health, National Agriculture and Food Research Organization
  • Uema Masashi
    Division of Biomedical Food Research, National Institute of Health Sciences
  • Asakura Hiroshi
    Division of Biomedical Food Research, National Institute of Health Sciences

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Other Title
  • 牛胆嚢内胆汁のカンピロバクター汚染状況と分離株の性状
  • ギュウ タンノウ ナイ タンジュウ ノ カンピロバクター オセン ジョウキョウ ト ブンリカブ ノ セイジョウ

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Abstract

<p>Campylobacter is one of the most important causes of food-borne infectious diseases. Antibiotics are rarely needed to treat campylobacteriosis, but occasionally used in severe or prolonged cases. Consumption of contaminated bovine liver is a source of campylobacteriosis. Bovine liver can be contaminated with Campylobacter on the surface and inside by the bile at slaughterhouses. Therefore, we investigated the current prevalence and characteristics of Campylobacter in bovine bile at a slaughterhouse. Campylobacter was isolated from 35.7% (55/154) of bile samples. C. jejuni and C. fetus were the two most frequent species. High antimicrobial resistant rates in C. jejuni were observed against tetracycline (63.0%) and ciprofloxacin (44.4%). Multi-locus sequence typing divided C. jejuni isolates (27 isolates) into 12 sequence types (STs) in which ST806 was the most frequent ST and accounted for 37.0%. All C. fetus were identified as C. fetus subsp. fetus which can cause systemic infections. High antimicrobial resistant rates in C. fetus were observed against ciprofloxacin (66.6%), streptomycin (58.3%) and tetracycline (33.3%). All the C. fetus isolates were divided into two STs, ST3 (16 isolates) and ST6 (8 isolates). Of the 16 ST3 isolates, 15 (93.8%) were resistant to both streptomycin and ciprofloxacin. Our data shows high prevalence of Campylobacter in bovine bile and their high rates of antimicrobial resistance. Preventing bile contamination of bovine liver at slaughterhouses is thus considered to be one of control measures to reduce the risk of Campylobacter infections.</p>

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