Comparative Analysis of Aerotolerance, Antibiotic Resistance, and Virulence Gene Prevalence in Isolates from Retail Raw Chicken and Duck Meat in South Korea
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Human infections with are primarily associated with the consumption of contaminated poultry meat. In this study, we isolated from retail raw chicken and duck meat in Korea and compared their aerotolerance, antibiotic resistance, and virulence gene prevalence. Whereas isolates from chicken dominantly belonged to multilocus sequence typing (MLST) clonal complex (CC)-21, CC-45 is the common MLST sequence type in duck meat isolates. strains from both chicken and duck meat were highly tolerant to aerobic stress. The prevalence of virulence genes was higher in strains from chicken than those from duck meat. However, antibiotic resistance was higher in duck meat isolates than chicken isolates. Based on the prevalence of virulence genes and antibiotic resistance, fluoroquinolone-resistant strains harboring all tested virulence genes except B11 were predominant on retail poultry. Fluoroquinolone-resistant strains carrying most virulence genes were more frequently isolated in summer than in winter. The comparative profiling analysis in this study successfully demonstrated that antibiotic-resistant and pathogenic strains of are highly prevalent on retail poultry and that retail duck meat is an important vehicle potentially transmitting to humans in Korea.
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