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Main characteristics of the herds in the four prevalence classes of S. aureus intramammary infections. LP, low prevalence herds; MLP, medium-low prevalence; MHP, medium-high; HP, high prevalence.
| Prevalence Class | Cubicle Houses (No.) | Stanchion Barns (No.) | Lactating Cows, Average (min.–max.) |
|---|---|---|---|
| LP | 20 | - | 96.2 (15–245) |
| MLP | 15 | 1 | 67.6 (40–130) |
| MHP | 10 | 1 | 52.0 (15–120) |
| HP | 13 | - | 70.6 (15–195) |
