Emergence of ciprofloxacin heteroresistance in foodborne Salmonella enterica serovar Agona

Background Bacterial heteroresistance has been increasingly identified as an important phenomenon for many antibiotic/bacterium combinations. Objectives To investigate ciprofloxacin heteroresistance in Salmonella and characterize mechanisms contributing to ciprofloxacin heteroresistance. Methods Ciprofloxacin-heteroresistant Salmonella were identified by population analysis profiling (PAP). Target mutations and the presence of PMQR genes were...