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

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

	V PM	V MG	V LG	NV
Total born piglets /sow	14.1 ± 2.8^a	13.9 ± 2.5^a	14.3 ± 3.5^a	13.6 ± 3.6^a
Live born piglets/sow	13.3 ± 2.7^a	13.5 ± 2.6^a	13.4 ± 3.6^a	12.9 ± 3.7^a
Weaning-to-mate interval (days)	4.2 ± 3.6^a	4.7 ± 5.9^a	4.8 ± 5.7^a	4.6 ± 5.0^a
Weaning-to-fecundation interval (days)	30.7 ± 7.7^a	30.6 ± 6.7^a	30.7 ± 6.6^a	30.2 ± 5.3^a
Weaned piglets/sow	12.0 ± 2.5^a	12.2 ± 2.4^a	12.1 ± 3.1^a	11.8 ± 3.7^a
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 ± 0.40^a,b	1.66 ± 0.38^a	1.64 ± 0.39^a	1.58 ± 0.38^b
Weaned piglet weight (Kg)	6.49 ± 1.50^a	6.52 ± 1.48^a	6.52 ± 1.45^a	6.37 ± 1.48^a

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)
V PM Vaccinated pre-mating, V MG Vaccinated at mid gestation, V LG Vaccinated at late gestation, NV Non-vaccinated

ISSN: 2055-5660