• Vaccine Ontology ID: VO_0004025
• Type: Subunit vaccine
• Status: Research
• Antigen: Recombinant TmpB protein.
• TmpB gene engineering:
  • Type: Recombinant protein preparation
  • Detailed Gene Information: Click Here.
• Adjuvant: Ribi vaccine adjuvant
  • VO ID: VO_0001238
• Immunization Route: Subcutanteous and i.p.

Guinea pig Response

• Host Strain: C4D
• Vaccination Protocol: In the first set of experiments, guinea pigs assigned randomly to seven groups of five animals each were immunized with TmpA, TmpB, TmpC, TmpA plus TmpB plus TmpC (TmpABC), or E. coli membranes. Five animals received adjuvant in phosphate-buffered saline, and five guinea pigs served as nonimmunized control. Each animal received six injections, each of 100 μg of antigen in a 0.4-ml volume, distributed in two subcutaneous injections (0.15 ml each) in the inguinal lymph nodes areas and one intraperitoneal injection (0.1 ml) (Wicher et al., 1991).
• Challenge Protocol: A week after immunizing injection 6, all animals, including untreated controls, were injected intradermally in a hind leg with 100 μl of suspension containing 3 X 10^6 T. pallidum Nichols freshly extracted from rabbit testes.
• Efficacy: Guinea pigs receiving TmpB antigen demonstrated protection expressed by the development of significantly (P less than 0.01) smaller, atypical lesions of significantly (P less than 0.01) shorter duration and devoid of or containing fewer T. pallidum organisms than lesions in the remaining immunized and control animals (Wicher et al., 1991).