Table 1 PCV-2 qPCR and PRRSV RT-qPCR results obtained prior to vaccination (3–4 woa), and at 6 and 9 woa in the 48 farms sampled in 2020, clustering the farms by their PCV-2 qPCR results

Positive

9 (18.8%)

1 (2.1%)

Only at 3–4 woa

1 (0.3%)

8.9 × 10⁴

0 (0.0%)

3 (6.2%)

Only at 6 woa

5 (1.7%)

2.64 × 10⁷ (3.4 × 10⁵–9.1 × 10⁷)

2 (66.7%)

2 (4.2%)

Only at 9 woa

3 (1.0%)

1.68 × 10⁶ (1.0 × 10⁴–4.99 × 10⁶)

1 (50.0%)

3 (6.2%)

At 6 and 9 woa

9 (3.1%)

1.06 × 10⁸ (9.8 × 10⁴–7.0 × 10⁸)

0 (0.0%)

Negative

39 (81.2%)

At 3–4, at 6 and at 9 woa

270 (93.8%)

–

17 (43.6%)

Total

48 (100.0%)

–

288 (100.0%)

6.09 × 10⁷ (1.0 × 10⁴ – 7.0 × 10⁸)

20 (41.7%)