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Volume 15, Number 3—March 2009
Research

Shiga Toxin–producing Escherichia coli Strains Negative for Locus of Enterocyte Effacement

Hayley J. Newton1, Joan Sloan1, Dieter M. Bulach, Torsten Seemann, Cody C. Allison, Marija Tauschek, Roy M. Robins-Browne, James C. Paton, Thomas S. Whittam, Adrienne W. Paton, and Elizabeth L. HartlandComments to Author 
Author affiliations: Monash University, Melbourne, Victoria, Australia (H.J. Newton, J. Sloan, D.M. Bulach, T. Seemann, C.C. Allison, E.L. Hartland); University of Melbourne, Melbourne (H.J. Newton, J. Sloan, M. Tauschek, R.M. Robins-Browne, E.L. Hartland); University of Adelaide, Adelaide, South Australia, Australia (J.C. Paton, A.W. Paton); Michigan State University, East Lansing, Michigan, USA (T.S. Whittam)

Main Article

Figure 4

Phylogenetic relationships of 17 locus of enterocyte effacement (LEE)–negative and 13 LEE-positive Shiga toxin–producing Escherichia coli (STEC) strains (highlighted in gray) compared with a cohort of reference E. strains. Phylogeny was demonstrated by a neighbor-joining algorithm from 7 housekeeping gene sequences. Each isolate has been assigned a sequence type (ST) (in boldface), and assigned clonal groups (CGs) are displayed. The scale bar demonstrates the branch length that corresponds to 2

Figure 4. Phylogenetic relationships of 17 locus of enterocyte effacement (LEE)–negative and 13 LEE-positive Shiga toxin–producing Escherichia coli (STEC) strains (highlighted in gray) compared with a cohort of reference E. strains. Phylogeny was demonstrated by a neighbor-joining algorithm from 7 housekeeping gene sequences. Each isolate has been assigned a sequence type (ST) (in boldface), and assigned clonal groups (CGs) are displayed. The scale bar demonstrates the branch length that corresponds to 2 nucleotide substitutions per 1,000 nucleotide sites. Significant nodes were identified by bootstrapping (Monte Carlo randomization); nodes were present in >70% of the 1,000 bootstrap trees highlighted and identified as significant.

Main Article

1These authors contributed equally to this article.

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