Use of a Mycobacterium Adjuvant to Enhance the Antibody Re- sponse to Vaccination against Staphylococcus aureus Mastitis in Dairy Heifers
نویسنده
چکیده
A novel adjuvant (Immunoboost®) to enhance antibody titer response to a commercial vaccine (Lysigin®) against Staphylococcus aureus mastitis in dairy heifers was evaluated. In Phase 1, hyper-immunization with Lysigin® to enhance serum titers did not result in titers that exceeded conventional immunization. In Phase 2, anti-S. aureus titers in heifers immunized with Lysigin® + Immunoboost® tended to be elevated (P = 0.10) over heifers immunized with Lysigin® alone by day (D) 7 continuing through D14. By D21, titers in the Immunoboost® group were elevated (P = 0.05) over conventional vaccinates through D35, returning to baseline by D42. After booster injections on D42, the Immunoboost® group exhibited increased (P = 0.05) titers over conventional vaccinates on D49 through D63, remaining elevated through D84. Findings suggest that Immunoboost® enhanced anti-S. aureus titer responses to commercial vaccination, and support the use of immunization to control S. aureus mastitis in dairy heifers.
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