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Salmonella enterica serovar Typhimurium Virulence-Resistance Plasmids Derived from the pSLT Carrying Nonconventional Class 1 Integrons with dfrA12 Gene in Their Variable Region and sul3 in the 3 ' Conserved Segment
We thank the technical staff of the NRL-Salm at the Federal Institute for Risk Assessment for excellent technical assistance and the Med-Vet-Net WP21 Project Group, which provided the isolates used in this study. We also thank A. Herrero for invaluable advice and L. Martinez Martinez (Hospital Universitario de Valdecilla, Santander, Spain), A. Carattoli (ISS, Rome, Italy), and the ESBLs-SafefoodEra Consortium (EU-SAFEFOODERA project 08176) for kindly providing reference strains. This work was supported by the Federal Institute for Risk Assessment (BfR: 46-001 and 45-004) and the EU Network of Excellence Med-Vet-Net (WP21).