Figure 4: The PTSL vaccine protected piglets from virulent S. Choleraesuis challenge.

Five randomly selected piglets from each group were challenged with 3.0 × 108 CFU C78-2 i.v. (A) survival data; (B–D) individual piglet body weights of the control (B), PO (C), and IM (D) groups. (E) protective efficacy (surviving animals with body weight gain were considered to be protected by vaccination).