Table 2.

Average daily weight gain (ADWG) ± STD in the four groups under study for each replicate

	REPLICATE		GROUP
			A	B	C	D
			(100)b	(100)b	(100)b	(100)b
ADWGa	1st	from weaning to 12 weeks of age	317 ± 78	303 ± 92	310 ± 69	325 ± 71
		from 12 weeks to 24 weeks of age	681 ± 129	649 ± 131	633 ± 98	683 ± 132
	2nd	from weaning to 12 weeks of age	244 ± 92	308 ± 72	255 ± 83	304 ± 75
		from 12 weeks to 24 weeks of age	613 ± 97	683 ± 115	623 ± 125	696 ± 104
	3rd	from weaning to 12 weeks of age	391 ± 72	410 ± 89	420 ± 91	363 ± 88
		from 12 weeks to 24 weeks of age	741 ± 110	740 ± 107	704 ± 124	730 ± 121

^aaverage daily weight gain: grams/day; ^bnumber of pigs at enrolment (first weighing)

Group A: pigs vaccinated at 4 weeks; group B: pigs vaccinated at 6 weeks; group C: pigs vaccinated at 8 weeks; group D: non-vaccinated placebo/controls