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Incidence of clinical mastitis in the dry period and new infection status at calving in seven dairy herds (Adapted from 3]).
| New clinical cases in dry period | New IMI at calving | |||
|---|---|---|---|---|
| Seal | Untreated | Seal | Untreated | |
| No. of quarters at risk | 784 | 812 | 784 | 799 |
| No. of new infections | 0a | 10b | 27c | 93d |
Numbers within columns marked with a,b or c,d, differ significantly (P = 0.0011 or P < 0.001, respectively) between treatments.
