TABLE 3.
Sharing of E. coli subtypes within and among individuals belonging to the same host speciesa
| Subtyping method and pattern | Cattle (%) | Horse (%) | Human (%) |
|---|---|---|---|
| Ribotyping | |||
| Unique (observed once) | 10.6 | 46.6 | 4.1 |
| Multiple within individual | 42.7 | 50.7 | 95.9 |
| Shared by two individuals | 46.7 | 2.7 | 0.0 |
| Shared by three individuals | 0.0 | 0.0 | 0.0 |
| Shared by four individuals | 0.0 | 0.0 | 0.0 |
| Total | 100 | 100 | 100 |
| ARA | |||
| Unique (observed once) | 9.5 | 2.7 | 3.5 |
| Multiple within individual | 13.5 | 5.5 | 21.1 |
| Shared by two individuals | 52.8 | 23.1 | 42.2 |
| Shared by three individuals | 12.1 | 40.2 | 0.0 |
| Shared by four individuals | 12.1 | 28.5 | 33.2 |
| Total | 100 | 100 | 100 |
a
The categories are mutually exclusive, e.g., a subtype shared by three individuals would be counted only in that category. For ribotyping, n was 75, 72, and 75 for cattle, horses, and humans, respectively; for ARA, n was 226, 302, and 355 for cattle, horses, and humans, respectively.