Emerg Infect DiseidEmerging Infectious Diseases1080-60401080-6059Centers for Disease Control106032152640791Research ArticleChanges in antimicrobial resistance among Salmonella enterica Serovar typhimurium isolates from humans and cattle in the Northwestern United States, 1982-1997.DavisM. A.HancockD. D.BesserT. E.RiceD. H.GayJ. M.GayC.GearhartL.DiGiacomoR.Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610, USA.Nov-Dec199956802806

We compared antimicrobial resistance patterns of Salmonella enterica serovar Typhimurium (ST) of isolates from humans (n = 715) and cattle (n = 378) in the Pacific Northwest from 1982 through 1997. The major changes in antimicrobial resistance can be attributed to the widespread clonal dissemination of multidrug-resistant definitive phage type 104 ST.