Table 2. Detection of viraemia in different age groups.
| Age groups (days) | Number of animals | PCR positivity | |
|---|---|---|---|
| Number (and %) of positive animals | Number (and %) of stronger positive animals | ||
| sows | 20 | 9 (40) | 0 (0) |
| 2 | 15 | 15 (100) | 0 (0) |
| 7 | 15 | 11 (73.33) | 0 (0) |
| 14 | 15 | 9 (60) | 0 (0) |
| 21 | 15 | 7 (46.67) | 0 (0) |
| 28 | 15 | 10 (66.67) | 0 (0) |
| 36 | 15 | 1 (6.67) | 0 (0) |
| 43 | 15 | 1 (6.67) | 0 (0) |
| 57 | 15 | 11 (73.33) | 6 (40) |
| 90 | 15 | 8 (53.33) | 3 (20) |
| 120 | 15 | 4 (26.67) | 1 (6.67) |
| 150 | 15 | 8 (53.33) | 0 (0) |
Stronger positive criteria in this study: PPV2 genomic copies above 1x104/ml.