Table 1.

Number of positive serum samples displayed by productive age

Productive age	Positive samples	Seroprevalence 95% CI	OR 95% CI	P
Sow	447/633	70.6% (67–74.1%)	4.7 3.7–5.9	<0.00001
Weaner (up to 2 months)	7/58	12.1% (3.7–20.4%)	0.1 0.05–0.3	<0.00001
Slips (2–3 months)	41/133	30.8% (23–38.7%)	0.4 0.3–0.6	<0.00001
Fattening (4–6 months)	135/325	41.5% (36.2–46.9%)	0.6 0.5–0.8	0.0005
Finisher (over 6 months)	84/273	30.8% (25.3–36.2%)	0.4 0.3–0.5	<0.00001
Total	714/1422	50.2% (47.6–52.8%)