IncI1 Plasmid Carrying Extended-Spectrum-β-Lactamase Gene bla _CTX-M-1 in Salmonella enterica Isolates from Poultry and Humans in France, 2003 to 2008

IncI1 Plasmid Carrying Extended-Spectrum-β-Lactamase Gene bla _CTX-M-1 in Salmonella enterica Isolates from Poultry and Humans in France, 2003 to 2008 Chromosomal Integration of the Extended-Spectrum β-Lactamase Gene bla _CTX-M-15 in Salmonella enterica Serotype Concord Isolates from Internationally Adopted Children Plasmid-Mediated Resistance to Cephalosporins in Salmonella enterica Serovar Typhi High Diversity of Extended-Spectrum β-Lactamases in Escherichia coli Isolates from Italian Broiler Flocks bla _CTX-M Genes in Escherichia coli Strains from Croatian Hospitals Are Located in New ( bla _CTX-M-3a ) and Widely Spread ( bla _CTX-M-3a and bla _CTX-M-15 ) Genetic Structures First Report of Plasmid-Mediated Quinolone Resistance Determinant qnrS1 in an Escherichia coli Strain of Animal Origin in Italy Extended-Spectrum-β-Lactamase-Producing Enterobacteriaceae Strains in Various Types of Private Health Care Centers Identification and Characterization of CTX-M-Producing Shigella Isolates in the United States Novel Plasmid-Encoded Ceftazidime-Hydrolyzing CTX-M-53 Extended-Spectrum β-Lactamase from Salmonella enterica Serotypes Westhampton and Senftenberg Emergence of Plasmid-Mediated Quinolone Resistance among Non-Typhi Salmonella enterica Isolates from Humans in the United States