Time in relation to treatment (months) | Herd A | Herd B |
---|---|---|
No. pigs with dead mites/No. pigs scraped | No. pigs with dead mites/No. pigs scraped | |
<0 (before treatment) | 8/95 | 23/203 |
0 – 1 | 2/96 | 8/214 |
1 – 4 | 1/99 | 3/219 |
4 – 8 | 0/81 | 1/166 |
8 – 12 | 1/67 | 0/132 |
12 – 16 | 11/62 | 0/106 |
16 – 20 | 0/47 | 0/81 |
Total (after treatment) | 5/452 | 13/918 |