Table 1. Cluster conservation (integrity) based on rep-PCR fingerprints generated at the two laboratories.
The table shows the number of isolates from each centre that cluster ≥95 % similarity. Clusters A–E were assigned for isolates originating from Cleveland, and WW1–8 clustering originated from Cologne.
| Cluster | Testing laboratory and no. of isolates in cluster | |
| Cleveland | Cologne | |
| A | 5 | 5 |
| B | 4 | 2 |
| C | 2 | 2 |
| D | 4 | 5 |
| E | 29* | 23 and 6* |
| Unclustered | 6 | 7 |
| WW1 | 5 | 5 |
| WW2 | 8 | 8 |
| WW3 | 5 | 5 |
| WW4 | 4 | 4 |
| WW5 | 5 | 5 |
| WW6 | 5 | 5 |
| WW7 | 6 | 5 |
| WW8 | 5 | 5 |
| Unclustered | 7 | 8 |
*
Twenty-nine isolates clustered together from data generated in Cleveland. These same isolates formed two clusters of 6 and 23 isolates when rep-PCR was performed in Cologne.