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

Table 2

The protective effect of piglets in each group at 21 days after the second immunization.

Group	Number of animals	Challenged dose (CFU)	Number of animals with clinical signs	Morbidity (%)	Survival (%)	Survival time (d)
G1	7	7.5 × 10^9	4	1.43	100	10 ± 0.0
G3	5	7.5 × 10^9	5	100	0	1.9 ± 0.8
G4	4	0	0	0	100	10 ± 0.0

The assessed clinical signs included incoordination, ataxia, anorexia, severe dyspnoea, and coughing.
The days of survival after challenge for each piglet were recorded until 10 days.