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Phylogeny Of Shiga Toxin-Producing Escherichia Coli O157 Isolated From Cattle And Clinically Ill Humans, James L. Bono, Timothy P. L. Smith, James E. Keen, Gregory P. Harhay, Tara G. Mcdaneld, Robert E. Mandrell, Woo Kyung Jung, Thomas E. Besser, Peter Gerner-Smidt, Martina Bielaszewska, Helge Karch, Michael L. Clawson
Phylogeny Of Shiga Toxin-Producing Escherichia Coli O157 Isolated From Cattle And Clinically Ill Humans, James L. Bono, Timothy P. L. Smith, James E. Keen, Gregory P. Harhay, Tara G. Mcdaneld, Robert E. Mandrell, Woo Kyung Jung, Thomas E. Besser, Peter Gerner-Smidt, Martina Bielaszewska, Helge Karch, Michael L. Clawson
Roman L. Hruska U.S. Meat Animal Research Center: Reports
Cattle are a major reservoir for Shiga toxin-producing Escherichia coli O157 (STEC O157) and harbor multiple genetic subtypes that do not all associate with human disease. STEC O157 evolved from an E. coli O55:H7 progenitor; however, a lack of genome sequence has hindered investigations on the divergence of human- and/or cattle-associated subtypes. Our goals were to 1) identify nucleotide polymorphisms for STEC O157 genetic subtype detection, 2) determine the phylogeny of STEC O157 genetic subtypes using polymorphism-derived genotypes and a phage insertion typing system, and 3) compare polymorphism-derived genotypes identified in this study with pulsed field gel electrophoresis (PFGE), the …