Appearance of multiresistant Salmonella typhimurium DT104 in swine in Poland
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The SafePork conference series began in 1996 to bring together international researchers, industry, and government agencies to discuss current Salmonella research and identify research needs pertaining to both pig and pork production. In subsequent years topics of research presented at these conferences expanded to include other chemical and biological hazards to pig and pork production.
Salmonella (S.) Typhimurium phage type distribution remains unrecognised in Poland. We describe DT104 that appeared in swine no later than in 1998. The study revealed the presence of two integrons of 1.0 kb and 1.2 kb referring to, aminoglycoside and b-lactamase resistance genes cassette respectively in all DT104 and in one NT strain showing ACSSuT profile. These isolates tend to demonstrate additional resistance profiles. The findings illustrate the world-wide spread of multiresistant clone and point out the import of subclinically infected animals as a source of DT104 introduction into Polish swine herds.