Detection of aac(6')-Ib-cr in Avian Pathogenic Escherichia coli Isolates in Japan

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  • KAWANISHI Michiko
    National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1–15–1 Tokura, Kokubunji, Tokyo 185–8511, Japan
  • OZAWA Manao
    National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1–15–1 Tokura, Kokubunji, Tokyo 185–8511, Japan
  • HIKI Mototaka
    National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1–15–1 Tokura, Kokubunji, Tokyo 185–8511, Japan
  • ABO Hitoshi
    National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1–15–1 Tokura, Kokubunji, Tokyo 185–8511, Japan
  • KOJIMA Akemi
    National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1–15–1 Tokura, Kokubunji, Tokyo 185–8511, Japan
  • ASAI Tetsuo
    The United Graduate School of Veterinary Sciences, Gifu University, 1–1 Yanagido, Gifu 501–1193, Japan

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タイトル別名
  • Detection of <i>aac(6’)-Ib-cr</i> in Avian Pathogenic <i>Escherichia coli</i> Isolates in Japan
  • Detection of aac(6′)-Ib-cr in avian pathogenic Escherichia coli isolates in Japan

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We investigated the prevalence of plasmid-mediated quinolone resistance (PMQR) genes in avian pathogenic Escherichia coli (APEC) strains in Japan. A total of 117 APEC strains collected between 2004 and 2007 were examined for PMQR genes (qnrA, qnrB, qnrC, qnrD, qnrS, aac(6’)-Ib-cr, qepA and oqxAB) by polymerase chain reaction. None of the APEC strains carried qnrA, qnrB, qnrC, qnrD, qnrS, qepA or oqxAB, but one of the isolates was identified as an AAC (6’)-Ib-cr producer. Phylogenetic grouping, multi-locus sequence typing and serotyping showed that this isolate belonged to phylogenetic group A, sequence type 167 and untypable serogroup. To our knowledge, this is the first report of the aac (6’)-Ib-cr gene in bacteria from food-producing animals in Japan.

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