Table 1. Characteristics of C. difficile strains used in this study.
| Strain name | Ribotype | Isolation year | Isolation country | Hypervirulence |
|---|---|---|---|---|
| CD630 | 13 | 1982 | Switzerland | no |
| CD196 | 27 | 1985 | France | no |
| QCD-32g58 | 27 | 2004 | Canada | yes |
| R20291 | 27 | 2006 | UK | yes |
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