First Report of cfr -Mediated Resistance to Linezolid in Human Staphylococcal Clinical Isolates Recovered in the United States

First Report of cfr -Mediated Resistance to Linezolid in Human Staphylococcal Clinical Isolates Recovered in the United States Elevated Linezolid Resistance in Clinical cfr -Positive Staphylococcus aureus Isolates Is Associated with Co-Occurring Mutations in Ribosomal Protein L3 Methicillin-Resistant and -Susceptible Staphylococcus aureus Strains of Clonal Lineages ST398 and ST9 from Swine Carry the Multidrug Resistance Gene cfr Identification and Characterization of the Multidrug Resistance Gene cfr in a Panton-Valentine Leukocidin-Positive Sequence Type 8 Methicillin-Resistant Staphylococcus aureus IVa (USA300) Isolate Resistance to Linezolid in a Porcine Clostridium perfringens Strain Carrying a Mutation in the rplD Gene Encoding the Ribosomal Protein L4 Linezolid Resistance in Staphylococcus aureus : Gene Dosage Effect, Stability, Fitness Costs, and Cross-Resistances Mutations in Ribosomal Protein L3 Are Associated with Oxazolidinone Resistance in Staphylococci of Clinical Origin Linezolid and Tiamulin Cross-Resistance in Staphylococcus aureus Mediated by Point Mutations in the Peptidyl Transferase Center Delayed Development of Linezolid Resistance in Staphylococcus aureus following Exposure to Low Levels of Antimicrobial Agents First Report of the Multidrug Resistance Gene cfr and the Phenicol Resistance Gene fexA in a Bacillus Strain from Swine Feces