Serotypes, antimicrobial resistance, and genomic analysis of Salmonella isolates from slaughtered swine in Gunma prefecture, Japan
2008
Takada, H.(Gunma-ken. Government Office, Maebashi (Japan)) | Inoue, N. | Amada, M. | Nobusawa, T. | Nakajima, T. | Ishioka, T. | Fujita, M. | Morita, Y.
We investigated the serotypes, antimicrobial resistance, and genomic analysis of Salmonella isolates from bile and caecum contents of slaughtered swine (n = 110) from 59 farms in Gunma prefecture, Japan. Salmonella spp. were detected in eight swine (7.3%) from seven farms (11.9%). Of these positive swine, S. typhimurium and S. derby were isolated from five and three caecum content samples, respectively. In addition, one swine harbored S. derby in a bile sample ( 30MPN/100 ml). The S. typhimurium isolates showed resistance to ampicillin, chloramphenicol, streptomycin, tetracycline, florfenicol and sulfamethizole. The organisms were presumed to be phage type DT104 by using the PCR method. Our results suggested that the multiple drug-resistant S. typhimurium has already spread out over swine in Gunma prefecture and caecum content and bile may be potential vehicles for contaminating edible product at a swine processing plant.
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