Effect of three commercially available adjuvants on the production of antibodies to Pasteurella multocida in broilers.

Three commercially available adjuvants--incomplete Freund's, Ribi adjuvant system, and Hunter's TiterMax--were used to compare antibody responses of broilers to Pasteurella multocida antigen. Differences among treatments over the 9-week study were determined by measuring antibody responses of twice-vaccinated birds using an enzyme-linked immunoassay. The antibody level induced by the vaccine with incomplete Freund's adjuvant was the highest, followed by the vaccines with TiterMax and Ribi.