Volume 18, Number 4—April 2012
Research
Comparison of Escherichia coli ST131 Pulsotypes, by Epidemiologic Traits, 1967–2009
Table 3
Segregation, by geographic region, of multiple-isolate pulsotypes and of Escherichia coli ST131 isolates from the pulsotypes, 1967–2009*
Multiple-isolate pulsotype group |
No. isolates, by geographic region, from pulsotype group (474) |
No. pulsotypes, by geographic region, among isolate group (65) |
|||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Source region | Total no. pulsotypes in group (65) | Total no. isolates in group (474) | |||||||||||||||
US (358) | W (47) | MW (139) | S (84) | NE (88) | CAN (52) | INT (64) | US (61) | W (24) | MW (38) | S (23) | NE (31) | CAN (15) | |||||
US | 61 | 463 | NA | 47 | 139† | 84 | 88 | 50 | 55‡ | NA | |||||||
West | 24 | 348 | 272† | NA | 105 | 62 | 58 | 41 | 35‡ | 24 | NA | ||||||
MW | 38 | 408 | 309 | 33† | NA | 74 | 63‡ | 47 | 52 | 38† | 15 | NA | |||||
South | 23 | 350 | 272 | 23‡ | 108 | NA | 57† | 43 | 35‡ | 23 | 10 | 17 | NA | ||||
NE | 31 | 368 | 287† | 23‡ | 106 | 68 | NA | 43 | 38‡ | 31 | 12 | 17 | 12 | NA | |||
CAN | 15 | 279 | 201† | 10‡ | 92† | 52 | 47 | NA | 26§ | 14 | 5 | 11 | 7 | 8 | NA | ||
INT | 20 | 336 | 231‡ | 17‡ | 102 | 58 | 54† | 41 | NA | 17 | 14 | 14 | 8 | 10 | 5 |
*Values in parentheses are n values. Boldface indicates significant associations; boldface italics indicate negative associations. Blank spaces indicate duplicated comparisons (mirror image of matrix). ST, sequence type; US, United States; W, West; MW, Midwest; S, South; NE, Northeast; CAN, Canada; INT, international (non-US locales other than Canada); NA, not applicable.
†p<0.05 for indicated region vs. all other regions (Fisher exact test).
‡p<0.001 for indicated region vs. all other regions (Fisher exact test).
§p<0.01 for indicated region vs. all other regions (Fisher exact test).
1MASTER (Macrorestriction Analysis of ST131 for Epidemiologic Research) Investigators who contributed data are listed at the end of this article.