Table 1. Phage carriage in 91 C. difficile 027 isolates in relation to their MLVA types.
| MLVA type | Number of isolates | Morphology of phage isolated | Exceptions |
| 1 | 3 | Defective myovirus | - |
| 2 | 1 | Defective myovirus | - |
| 3 | 5 | Defective myovirus | - |
| 4 | 7 | Defective myovirus | - |
| 5 | 1 | Defective myovirus | - |
| 6 | 2 | Defective myovirus | - |
| 7 | 7 | Defective myovirus | - |
| 8 | 2 | Defective myovirus | - |
| 9 | 2 | Defective myovirus | - |
| 10 | 1 | Defective myovirus | - |
| 11 | 3 | Defective myovirus | - |
| 12 | 6 | Defective myovirus | 66L (Siphovirus F) |
| 13 | 12 | Defective myovirus | 96L (Myovirus A) |
| 14 | 3 | Defective myovirus | - |
| 15 | 6 | Defective myovirus | 91L (Myovirus A) |
| 16 | 15 | PT- LPs* | 16L (Novel myovirus E) |
| 17 | 5 | PT- LPs* | - |
| 18 | 3 | Siphovirus | 53L (Defective myovirus B) |
| 19 | 1 | PT- LPs* | - |
| 20 | 2 | PT- LPs* | - |
| 21 | 1 | PT- LPs* | - |
| 22 | 2 | PT- LPs* | 36L (No phage) |
| 23 | 1 | PT-LPs* | - |
, Phage tail-like particles.
Prophage carriage among the 91 C. difficile 027 isolates induced with mitomycin C or norfloxacin was correlated to their multiple-locus variable number tandem repeat analysis (MLVA) types. MLVA 1–15 yielded defective myoviruses with three exceptions in MLVA 12 (isolate 66L yielding a siphovirus F), MLVA 13 (isolate 96L yielding a myovirus A) and MLVA 15 (isolate 91L yielding a myovirus A) in addition to the defective myoviruses. MLVA 16 and 17 and 19–23 all yielded phage tail-like particles (PT-LPs) except in MLVA 16 with one isolate yielding myovirus E and another (isolate 36L) in MLVA 22 which yielded no phage under the experimental conditions. Among the three isolates examined in MLVA 18, two yielded siphoviruses and one (isolate 53L) yielded defective myoviruses.