The prevalence of cefotaxime-resistant Salmonella enterica serotype Virchow has dramatically increased in South Korea since the first isolation in 2011. Of 68 isolates collected over 10 years, 28 cefotaxime-resistant isolates harbored the bla(CTX-M-15) extended-spectrum β-lactamase gene and were closely related genetically, demonstrating the clonal dissemination of CTX-M-15-producing Salmonella Virchow in South Korea.
Keywords: CTX-M-15; ESBL; IncHI2; S. enterica; Salmonella enterica; Salmonella enterica serotype Virchow; South Korea; antimicrobial resistance; bacteria; clonal dissemination; emergence; extended-spectrum β-lactamases; nontyphoidal salmonella; prevalence; salmonella; surveillance.