Multidrug-resistant Salmonella enterica subspecies enterica 4,[5],12:i:- sequence type 34 represents a worldwide public health risk. To determine its origin in the United States, we reconstructed a time-scaled phylogeny with a discrete trait geospatial model. The clone in the United States was introduced from Europe on multiple occasions in the early 2000s.
Keywords: Europe; Evolution; Salmonella enterica subspecies enterica; Salmonella monophasic; United States; antimicrobial resistance; bacteria; enteric infections; foodborne; multidrug-resistance; serotype 4,[5],12:i:-; zoonoses; zoonotic.