Table 2.
Prevalence of Restriction Endonuclease Analysis Groups in Clostridium difficile Infection Recurrences Due to the Same or Different Strains
| REA Group | Present in Initial Infection | Initial Infection Is First CDI for Patient | Initial Infection Is First Recurrence for Patient | Recurrence With Same Strain | Recurrence With Different Strain | Replaced a Different Strain |
|---|---|---|---|---|---|---|
| BI group | 34 | 23 | 11 | 31 | 3 | 4 |
| BI6/8/17 | 26 | 18 | 8 | 24 | 2 | 1 |
| BI group (not BI6/8/17) | 8 | 5 | 3 | 7 | 1 | 3 |
| Y group | 10 | 8 | 2 | 6 | 4 | 1 |
| J group | 8 | 8 | 0 | 8 | 0 | 1 |
| G group | 7 | 6 | 1 | 3 | 4 | 0 |
| AH group | 4 | 4 | 0 | 3 | 1 | 0 |
| L group | 3 | 3 | 0 | 3 | 0 | 1 |
| K group | 3 | 2 | 1 | 3 | 0 | 0 |
| A group | 3 | 0 | 3 | 2 | 1 | 0 |
| N group | 2 | 1 | 1 | 2 | 0 | 1 |
| CF group | 2 | 2 | 0 | 1 | 1 | 0 |
| AL group | 1 | 1 | 0 | 1 | 0 | 0 |
| BX group | 1 | 1 | 0 | 1 | 0 | 0 |
| E group | 1 | 1 | 0 | 1 | 0 | 0 |
| W group | 1 | 1 | 0 | 1 | 0 | 0 |
| AA/BK group | 1 | 0 | 1 | 1 | 0 | 0 |
| Z group | 1 | 1 | 0 | 1 | 0 | 0 |
| AV group | 1 | 1 | 0 | 1 | 0 | 0 |
| BK group | 1 | 1 | 0 | 1 | 0 | 0 |
| DH group | 0 | 0 | 0 | 0 | 0 | 2 |
| Nonspecific REA groupsa | 6 | 5 | 1 | 5 | 1 | 5 |
Abbreviations: CDI, Clostridium difficile infection; REA, restriction endonuclease analysis.
a Unable to be matched to existing REA groups.