Table 3 PCV-2 qPCR and PRRSV RT-qPCR results obtained prior to vaccination (3–4 woa), and at 6 and 9 woa in the 28 farms sampled in 2022, clustering the farms by their PCV-2 qPCR results

Positive

12 (42.9%)

1 (3.6%)

Only at 6 woa

2 (1.2%)

6.6 × 10⁵ (1 × 10⁴–1.3 × 10⁶)

1 (3.6%)

5 (17.9%)

Only at 9 woa

8 (4.8%)

1.1 × 10⁸ (1 × 10⁴ – 8.3 × 10⁸)

4 (14.3%)

4 (14.3%)

At 6 and 9 woa

12 (7.1%)

1.2 × 10⁶ (1 × 10⁴ – 9.5 × 10⁶)

3 (10.7%)

1 (3.6%)

At 3–4 and 9 woa

3 (1.8%)

8.3 × 10⁷ (1.7 × 10⁴ – 2.3 × 10⁸)

1 (3.6%)

1 (3.6%)

At 3–4, at 6 and at 9 woa

4 (2.4%)

3.4 × 10⁶ (1 × 10⁴ –1.3 × 10⁷)

0 (0.0%)

Negative

16 (57.1%)

At 3–4, at 6 and at 9 woa

139 (82.7%)

–

6 (21.4%)

Total

28 (100.0%)

–

168 (100.0%)

4.1 × 10⁷ (1 × 10⁴ – 8.3 × 10⁸)

15 (53.6%)