Table 4.

Pig level seroprevalence antibodies to Lawsonia intracellularis and the P-value for the test of their difference for sows and gilts for farms in Ontario and Quebec

Province	Farm type	Sow level seroprevalence (sχ̄)	Gilt level seroprevalence (sχ̄)	P-value
Ontario	FF and FAR + NUR	91.1% (3.3%)	91.8% (5.4%)	0.91
Quebec	FF and FAR +/− NUR	86.9% (2.4%)	64.1% (9.4%)	0.009

FF — farrow-to-finish farms, FIN — finishing farms, FAR — farrowing farms, NUR — Nursery