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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

Table 4

Distribution, by geographic region, of Escherichia coli ST131 isolates from different pulsotype groups and from individual pulsotypes, 1967–2009*

Region Total isolates,
N = 579 High-prevalence pulsotypes, n = 327 Multiple-isolate pulsotypes, n = 474 Individual high-prevalence pulsotypes
968, n = 136 800, n = 82 812, n = 32 987, n = 11 1202, n = 8
US 446 (77) 239 (73)† 358 (80) 107 (79) 55 (67)‡ 25 (78) 1 (9)§ 8 (100)
West 59 (10) 22 (7)† 47 (10) 4 (7)§ 3 (4)‡ 5 (16) 0 4 (50)†
MW 180 (31) 56 (31) 139 (29) 53 (39)‡ 24 (29) 7 (22) 1 (9) 2 (25)
South 98 (17) 64 (20) 84 (18) 26 (19) 17 (21) 8 (25)† 0 2 (25)
NE 109 (19) 53 (16) 88 (19) 24 (18) 11 (13) 5 (16) 0 0
CAN 53 (9) 42 (13)§ 52 (11)§ 14 (10) 20 (24)§ 0 0 0
INT 80 (14) 46 (14) 64 (14) 15 (11) 7 (9) 7 (23) 10 (91)§ 0

*Values are no (%) isolates. Boldface indicates p<0.05 in comparison with all other isolates (Fisher exact test). Pulsotypes are those among the 12 high-prevalence pulsotypes that exhibited a significant association with >1 geographic region. ST, sequence type; US, United States; MW, US Midwest; NE, US Northeast; CAN, Canada; INT, international (non-US locales other than Canada).
†p<0.01 for indicated pulsotype group or pulsotype vs. all others (Fisher exact test).
‡ p<0.05 for indicated pulsotype group or pulsotype vs. all others (Fisher exact test).
§p<0.001 for indicated pulsotype group or pulsotype vs. all others (Fisher exact test).

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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