Serotypes, Antimicrobial Resistance, and Genomic Analysis of <I>Salmonella</I> Isolatesfrom Slaughtered Swine in Gunma Prefecture, Japan

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  • 豚におけるサルモネラの保菌状況と分離菌の血清型, 薬剤感受性およびゲノム型
  • ブタ ニ オケル サルモネラ ノ ホキン ジョウキョウ ト ブンリキン ノ ケッセイガタ ヤクザイ カンジュセイ オヨビ ゲノムガタ
  • Serotypes, Antimicrobial Resistance, and Genomic Analysis of Salmonella Isolatesfrom Slaughtered Swine in Gunma Prefecture, Japan

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Abstract

We investigated the serotypes, antimicrobial resistance, and genomic analysis of Salmonella isolates frombile and caecum contents of slaughtered swine (n=110) from 59 farms in Gunma Prefecture, Japan. Salmonellaspp. were detected in eight swine (7.3%) from seven farms (11.9%). Of these positive swine, S. Typhimuriumand S. Derby were isolated from five and three caecum content samples, respectively. In addition, oneswine harbored S. Derby in a bile sample (<30MPN/100ml). The S. Typhimurium isolates showed resistanceto ampicillin, chloramphenicol, streptomycin, tetracycline, florfenicol and sulfamethizole. The organisms werepresumed to be phage type DT104 by using the PCR method. Our results suggested that the multiple drugresistant S. Typhimurium has already spread out over swine in Gunma prefecture and caecum content and bilemay be potential vehicles for contaminating edible product at a swine processing plant.

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