Extended-spectrum β-lactamases and AmpC β-lactamases in ceftiofur-resistant Salmonella enterica isolates from food and livestock obtained in Germany during 2003–07

Abstract

Among the 22 679 German Salmonella isolates investigated, the ESBL and AmpC beta-lactamase prevalence was still low; however, it is slowly increasing. Various beta-lactamase genes are linked to a variety of genetic elements capable of horizontal DNA transfer. Consequently, their dissemination is likely and demands adequate risk management strategies.