Uticaj vakcine Porcilis PRRS na kvalitet sperme nerastova – Prikaz slučaja

Abstract

Implementation of A.I. in the pig industry allows introduction of superior genes for highest meat production or fertility, and thus allowing maximal profitability from boars of the best genetic potential. The risk of disease spreading by direct contact among animals is reduced by introduction of artificial insemination techniques of sows, but at the same time, there is condition created for “an mass” propagation of pathogenic microorganisms by semen used for AI of sows and gilts (Maes et al., 2008). Porcine reproductive-respiratory syndrome (PRRS) is an actual viral disease of pigs provoking serious health problems and major economic damages across the world and as well in R. of Serbia (Avakumović, 2006). Due to the significant pig losses, certain preventive measures are implemented, including vaccination of pigs in the infected farms (Zuckermann et al, 2007). Former scientific papers mainly refers to the effects of vaccine in piglets and gilts. Prieto et al. (1994) reported a decrease in sperm quality in infected boars and those vaccinated with modified live vaccine(INGELVAC®,PRRS,MLV). This article describes boars’ semen quality before and after vaccination with Porcilis PRRS vaccine (Intervet International BV, The Netherlands). Semen quality was examined by semen computer analysis (CASA), by integrated software system for the analysis of sperm cells (ISAS; Proiser, Valencia, Spain). Average total sperm motility and progressive motility for 29 boars in the period prior to vaccination was 62.6% and 43.9%, respectively. The quality of sperm after vaccination significantly declined to 43.6% and 30.2%, respectively (p<0,05; t-test). Semen quality reduction after PRRS vaccination of boars was also described by Christopher-Hennings et al. (1997).