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Antimicrobial Agents and Chemotherapy, August 2005, p. 3533-3537, Vol. 49, No. 8
0066-4804/05/$08.00+0 doi:10.1128/AAC.49.8.3533-3537.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.
Extended-Spectrum-ß-Lactamase-Producing Escherichia coli Strains Isolated from Farm Animals from 1999 to 2002: Report from the Japanese Veterinary Antimicrobial Resistance Monitoring Program
Akemi Kojima,1*
Yoshikazu Ishii,2
Kanako Ishihara,1
Hidetake Esaki,1
Tetsuo Asai,1
Chitose Oda,1
Yutaka Tamura,1,
Toshio Takahashi,1 and
Keizo Yamaguchi2
National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo, 185-8511,1
Department of Microbiology, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan2
Received 14 August 2004/
Returned for modification 8 November 2004/
Accepted 1 May 2005
A nationwide surveillance for antimicrobial susceptibility in Escherichia coli strains isolated from food-producing animals in Japan was conducted from 1999 to 2002. Eighteen cefazolin-resistant E. coli strains were isolated from broilers. Six were CTX-M-type producing, and eight were CMY-2 producing, while eight had mutations at the ampC promoter region.
* Corresponding author. Mailing address: National Veterinary Assay Laboratory, Ministry of Agriculture, Forestry and Fisheries, 1-15-1 Tokura, Kokubunji, Tokyo 185-8511, Japan. Phone: 81-42-321-1841. Fax: 81-42-321-1769. E-mail:
kojimaa{at}nval.go.jp.
Present address: School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyoudai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan.
Antimicrobial Agents and Chemotherapy, August 2005, p. 3533-3537, Vol. 49, No. 8
0066-4804/05/$08.00+0 doi:10.1128/AAC.49.8.3533-3537.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.
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