PMID: 20622477Jul 14, 2010Paper

Characterization of antibiotic resistance and the emergence of AmpC-producing Salmonella Infantis from pigs

The Journal of Veterinary Medical Science
Hesham DahshanKaroku Okamoto

Abstract

During the period of 2007-2008, a total of 270 pig fecal samples were collected from a meat processing plant located in southern Japan and examined for Salmonella species. A total of 44 Salmonella isolates were recovered, and antimicrobial resistance was detected in serotypes Typhimurium (n=9), Infantis and Choleraesuis (n=2), and Derby, Miyazaki and Schwarzengrund (n=1). Multidrug resistance was seen in serotypes Typhimurium (n=8) and Infantis (n=2). The most commonly observed resistance phenotypes were against streptomycin, oxytetracycline and sulfamethoxazole (100%), ampicillin (90%), chloramphenicol (50%), cephalothin (30%) and cefoxitin, ceftazidime and kanamycin (each 20%). Extended-spectrum cephalosporin-resistant Salmonella Infantis isolates producing plasmid-mediated, bla(CMY-2) gene were detected. These AmpC-producing isolates showed resistance to ampicillin and cephems (cephalothin, cefoxitin and ceftazidime). Resistance transfer experiments showed that transconjugants and transformants coexpressed resistance phenotypes similar to the donor isolates. To the best of our knowledge, this is the first report worldwide describing serovar Infantis from pigs capable of producing AmpC β-lactamase. Then, we detected the penta...Continue Reading

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Citations

Jun 8, 2012·The Journal of Veterinary Medical Science·Mitsuhiro KameyamaKaroku Okamoto
Nov 10, 2010·Veterinary Research Communications·Hesham DahshanKaroku Okamoto
Mar 10, 2012·Foodborne Pathogens and Disease·Elisabeth HauserBurkhard Malorny
Jan 27, 2015·Foodborne Pathogens and Disease·Marjorie E Doyle
Aug 26, 2014·Jundishapur Journal of Microbiology·Fariba AsgharpourZahra Moulana
Mar 15, 2019·Epidemiology and Infection·S YukawaT Hasegawa
Jul 29, 2020·Antimicrobial Agents and Chemotherapy·Ying SunXiawei Wei

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