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Table 2 Productive parameters (mean ± SD or proportion [percentage] plus CI) of the four studied experimental groups

From: Exploratory field study on the effects of porcine circovirus 2 (PCV-2) sow vaccination at different physiological stages mimicking blanket vaccination

  V PM V MG V LG NV
Total born piglets /sow 14.1 ± 2.8a 13.9 ± 2.5a 14.3 ± 3.5a 13.6 ± 3.6a
Live born piglets/sow 13.3 ± 2.7a 13.5 ± 2.6a 13.4 ± 3.6a 12.9 ± 3.7a
Weaning-to-mate interval (days) 4.2 ± 3.6a 4.7 ± 5.9a 4.8 ± 5.7a 4.6 ± 5.0a
Weaning-to-fecundation interval (days) 30.7 ± 7.7a 30.6 ± 6.7a 30.7 ± 6.6a 30.2 ± 5.3a
Weaned piglets/sow 12.0 ± 2.5a 12.2 ± 2.4a 12.1 ± 3.1a 11.8 ± 3.7a
Abortions 1/60 (1.7%)a
CI: −1.6-4.9%
3/59 (5.1%)a
CI: −0.5-10.7%
0/61 (0.0%)a
CI: 0.0%
2/53 (3.8%)a
CI: −1.4–8,9%
Mummies 9/815 (1.1%)A
CI: 0.4–1.8%
10/753 (1.3%)A,B
CI: 0.5–2.1%
15/856 (1.8%)A,B
CI: 0.9–2.6%
15/695 (2.2%)B
CI: 1.1–3.2%
Stillbirth 37/815 (4.5%)a
CI: 3.1–6.0%
27/753 (3.6%)a
CI: 2.3–4.9%
41/856 (4.8%)a
CI: 3.4–6.2%
24/695 (3.5%)a
CI: 2.1–4.8%
Dead suckling piglets 74/769 (9.6%)a
CI: 7.5–11.7%
67/727 (9.2%)a
CI: 7.1–11.3%
72/799 (9.0%)a
CI: 7.0–11.0%
58/658 (8.8%)a
CI: 6.6–11.0%
Cross-fostered piglets 40/694 (5.8%)a,A,B
CI: 4.0–7.5%
33/659 (5.0%)a, A
CI: 3.3–6.7%
54/726 (7.4%)a,b,B
CI: 5.5–9.3%
53/600 (8.8%)b,A,B
CI: 6.6–11.1%
Piglets birth weight (Kg) 1.62 ± 0.40a,b 1.66 ± 0.38a 1.64 ± 0.39a 1.58 ± 0.38b
Weaned piglet weight (Kg) 6.49 ± 1.50a 6.52 ± 1.48a 6.52 ± 1.45a 6.37 ± 1.48a
  1. Different letters in superscript in a row indicate significant differences (p ≤ 0.05 for lower case letters) or tendency (p ≤ 0.10 for capital letters) among experimental groups (highlighted in bold)
  2. V PM Vaccinated pre-mating, V MG Vaccinated at mid gestation, V LG Vaccinated at late gestation, NV Non-vaccinated