Table 2.
The results of challenge with Actinobacillus pleuropneumoniae serovar 1 in vaccinated and unvaccinated control pigs.
| Treatment |
Control group (n = 5) |
Vaccine group (n = 6) |
|---|---|---|
| Mortalitya (%) | 20 (1/5) | 0 |
| Morbidity (%) | 80 (4/5) | 16.6 (1/6)* |
| Animals with dyspneab (%) | 80 (4/5) | 0* |
| Animals with feverb, c (%) | 60 (3/5) | 0 |
| Animals with depression and anorexiab (%) | 40 (2/5) | 16.6 (1/6) |
| Median lung lesion score | 21.3 ± 6.26 | 2.7 ± 2.92* |
| Mean bacterial titer in caudal lung lobes (CFU/g) | 5.5 × 104 ± 9.84 × 104 | 23 ± 49.9* |
a
Morbidity is given as the percentage of animals with increased respiratory rate and/or fever.
b
only those pigs that survived more than 24 h after challenge were included.
c
fever is defined as a body temperature of 40°C.
*
p < 0.05.