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Table 4 Percentage of pathological lesion score after challenge with homologous Streptococcus suis serotype 2 bacteria

From: Immunization with Streptococcus suis bacterin plus recombinant Sao protein in sows conveys passive immunity to their piglets

Groupa Total Score Reduced Percentage The Score of Gross Lesionsb
Brain Serosa Joint Spleen Liver Lung
Vaccination 4 81.0%e 0 (0/3) 0 (0/3) 0 (0/3) 0 (0/3) 0 (0/3) 4 (2/3)
Controld 21 - 0 (0/3) 0 (0/3) 0 (0/3) 5 (3/3) 3 (3/3) 13 (3/3)
  1. aVaccination: S. suis2 + rSao, Control: sterile saline
  2. bNo lesion = 0, lesion area <33% = 1, lesion area 33– 66% = 3, lesion area >66% = 5
  3. cDifferences between groups were analyzed by Student’s t-test P < 0.05
  4. dThe number of piglets in a group that was confirmed to have the presence of S
  5. suis serotype 2 bacteria