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Volume 18, Number 4—April 2012

Research

Comparison of Escherichia coli ST131 Pulsotypes, by Epidemiologic Traits, 1967–2009

James R. JohnsonComments to Author , Marie-Hélène Nicolas-Chanoine, Chitrita DebRoy, Mariana Castanheira, Ari Robicsek, Glen Hansen, Scott Weissman, Carl Urban, Joanne Platell, Darren Trott, George Zhanel, Connie Clabots, Brian D. Johnston, Michael A. Kuskowski, and the MASTER Investigators
Author affiliations: Veterans Affairs Medical Center, Minneapolis, Minnesota, USA (J.R. Johnson, C. Clabots, B.D. Johnston, M.A. Kuskowski); University of Minnesota, Minneapolis (J.R. Johnson, B.D. Johnston, M.A. Kuskowski); Hôpital Beaujon, Clichy, France (M.-H. Nicolas-Chanoine); The Pennsylvania State University, College Park, Pennsylvania, USA (C. DebRoy); JMI Laboratories, North Liberty, Iowa, USA (M. Castanheira); NorthShore University HealthSystem, Evanston, Illinois, USA (A. Robicsek); Hennepin County Medical Center, Minneapolis (G. Hansen); University of Washington, Seattle, Washington, USA (S. Weissman); New York Hospital Queens, Flushing, New York, USA (C. Urban); New York University School of Medicine, New York, New York, USA (C. Urban); University of Queensland, Brisbane, Queensland, Australia (J. Platell); University of Adelaide, Adelaide, South Australia, Australia (D. Trott); University of Manitoba, Winnipeg, Manitoba, Canada (G. Zhanel)

Main Article

Figure A1

Pulsed-field gel electrophoresis profile dendrogram of 87 diverse isolates of Escherichia coli ST131. Isolates for the dendrogram, which represent a 15% subsample of the total population (n = 579), were selected randomly after deliberate inclusion of 2 representatives of each pulsotype with >6 members (indicated by brackets) plus the earliest previously reported isolate (from 1985) and the earliest present isolate (from 1967). YEAR, year of isolation or submission to reference laboratory; FQ-

Figure A1. Pulsed-field gel electrophoresis profile dendrogram of 87 diverse isolates of Escherichia coli ST131. Isolates for the dendrogram, which represent a 15% subsample of the total population (n = 579), were selected randomly after deliberate inclusion of 2 representatives of each pulsotype with >6 members (indicated by brackets) plus the earliest previously reported isolate (from 1985) and the earliest present isolate (from 1967). YEAR, year of isolation or submission to reference laboratory; FQ-R, fluoroquinolone-resistant; ESBL, extended-spectrum β-lactamase; CTX-M-15, presence of blaCTX-M-15 (as detected by PCR); POS, positive (i.e., trait present); 2008–2009, interval during which isolate was collected. Scale is percent profile similarity.

Main Article

1MASTER (Macrorestriction Analysis of ST131 for Epidemiologic Research) Investigators who contributed data are listed at the end of this article.

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