Protective Efficacy of an Inactive Vaccine Based on the LY02 Isolate against Acute Haemophilus parasuis Infection in Piglets

Table 3

Levels of IgG antibody in the sera of piglets from each group.

Group	Number of animals	Levels of IgG antibody (means ± SD) at intervals (days)
		0	21	35	42	49	56	70
G1	7	1.6 ± 1.2	1.4 ± 0.7	1.3 ± 0.2	1.1 ± 0.2	3.9 ± 1.8	5.1 ± 0.8	3.9 ± 0.6
G2	6	1.9 ± 1.4	1.5 ± 0.4	1.3 ± 0.2	1.4 ± 0.1	1.5 ± 0.5	1.3 ± 0.2	1.4 ± 0.3
G3	5	1.2 ± 0.9	0.9 ± 0.5	0.8 ± 0.1	0.9 ± 0.2	0.9 ± 0.3	—	—

, compared to G3.
compared to G2.