Efficacy of experimental Newcastle disease water-on-oil oil-emulsion vaccines formulated from squalane and squalene
1990
Stone, H.D. | Xie, Z.X.
Water-in-oil inactivated Newcastle disease oil-emulsion vaccines were formulated with the terpene oils squalane or squalene, or mixtures thereof, and injected into 4-week-old broilers. Vaccine efficacy based on hemagglutination-inhibition (HI) titers was comparable to that of control mineral oil vaccines. Tissue reaction to intramuscular injection of the terpene oil emulsion vaccines was greatly reduced 3 weeks post-vaccination compared with that of mineral oil-based vaccine. Viscosity of the terpene oil vaccines was satisfactory but increased three to four times that of mineral oil vaccine when the antigen phase volume increased from 5% to 20%.
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