Groupa Body temperature () / Cases of bacteremia b (%)
Day 0 1 2 3 4 5 6 7
Vaccination c 0/0 0/0 0/33 0/0 0/0 0/0 0/0 0/0
Control 0/0 33 d/100 33 e/100 0/0 f 0/0 0/0 0/0 0/0
aVaccination: S. suis 2 + rSao, Control: sterile saline.
bThe body temperature and bacteremia of piglets were monitored daily for 7 days after challenge.
cDifferences between groups were analyzed by Student’s t-test P=0.0584. dTemperature>40°C,
e Temperature≥41℃.
fOne death occurred on the third day after challenge .The presence of S. suis serotype
1 bacteria was confirmed by bacteriology and multiplex PCR.
Table 1: Body temperatures and bacteremia of piglets after challenge with heterologous Streptococcus suis serotype 1 bacteria.