IMPROVAC™ (PFIZER ANIMAL HEALTH): AN IMMUNOLOGICAL PRODUCT FOR THE CONTROL OF BOAR TAINT IN MALE PIGS (II)
J.D. Mackinnon and M.C. Pearce

Abstract
II. Practical application in pig production and potential production benefits

This review examines the practical application and production benefits of Improvac™ (Pfizer Animal Health) - an anti-GnRF immunological product containing a GnRF peptide conjugate in an aqueous-based adjuvant. Vaccination of entire male pigs against naturally occurring gonadotrophin releasing factor (GnRF) provides a highly effective and welfare friendly alternative to surgical castration for the control of boar taint, with substantial additional benefits to pig producers. Because vaccination can be timed to occur close to slaughter, the use of this new technology enables the producer to capitalise on the natural growth and carcase characteristics of entire male pigs. Compared with surgically castrated males, pigs managed with Improvac™ utilise feed more efficiently and produce a leaner carcase. The suppression of characteristic peripubertal male behaviour improves terminal growth performance, enhances welfare, and reduces the risk of injury and compromised carcase quality.

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