Table 3.
Results of eradication of lice in 28 dairy herds.
| Examination time, months after medication | Number of herds examined | Free | D. bovis present | L. vituli present |
| 3–6 | 28 | 23 | 5 | 3 |
| 15–18 | 23 | 15 | 6 | 3 |
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