SEPPIC vaccine adjuvants for poultry.

Area of Science:

• Veterinary immunology
• Vaccine formulation science

Background:

• Traditional poultry vaccines face challenges in balancing efficacy and safety.
• Oil-based emulsions are commonly used as vaccine adjuvants.

Purpose of the Study:

• To evaluate novel oil-based emulsion formulations for inactivated poultry vaccines.
• To compare the safety and efficacy of water-in-oil (W/O) and water-in-oil-in-water (W/O/W) emulsions using specific adjuvants.

Main Methods:

• Two inactivated antigens (Newcastle disease virus and Pasteurella Multocida) were formulated with different adjuvants.
• Vaccines were tested in poultry, assessing antibody response, protection against challenge, and local reactions.
• Physicochemical properties of the vaccine formulations were analyzed.

Main Results:

• Water-in-oil (W/O) formulations demonstrated robust efficacy and safety.
• Water-in-oil-in-water (W/O/W) formulations showed enhanced safety with maintained efficacy.
• Montanide ISA 70 (W/O) and Montanide ISA 206 (W/O/W) provided improved safety and efficacy over traditional formulations.

Conclusions:

• Optimized W/O and W/O/W emulsion formulations can significantly improve poultry vaccine performance.
• Montanide ISA 70 and ISA 206 offer distinct advantages for vaccine development, depending on whether efficacy or safety is prioritized.