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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 6

Distribution, by ecologic source, of Escherichia coli ST131 isolates among different pulsotype groups and individual pulsotypes, 1967–2009*

Ecologic source No. (%) isolates
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 1202, n = 8 955, n = 7
Human 486 (84) 290 (89)† 412 (87)† 117 (86) 81 (99)† 31 (97)‡ 1 (13)† 0
Comp. animal 22 (4) 19 (6)# 21 (4) 13 (10)† 0 1 (3) 1 (8) 2 (29)§
Food animal 45 (8) 8 (2)† 28 (6)† 0 † 0 † 0 6 (75)† 2 (29)
Other animal 10 (1.7) 6 (2) 7 (1.5) 6 (4)§ 0 0 0 0
Food/water 15 (2.6) 4 (1)‡ 6 (1)† 0 ‡ 1 (1) 0 0 3 (43)
Food 6 (1.0) 3 (0.9) 4 (0.8) 0 0 0 0 3 (43)†
Water 9 (1.6) 1 (0.3)§ 2 (0.4)† 0 1 (1) 0 0 0

*Boldface indicates p<0.05 in comparison with all other isolates. Pulsotypes are those, among the 12 high-prevalence pulsotypes, that exhibited a significant association with >1 source group. ST, sequence type; comp., companion.
†p<0.001 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<0.01 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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