Field study analysis of the influences of deworming regimens and housing conditions on parasites and sperm output in 21 European boar studs

Abstract The current study reports the parasitological results of a quality control audit in 21 European boar studs. Field investigations were performed over a 2-year period (2012–2013) during the winter and spring. From each stud, an average of 30 (range, 25–33) individual faecal samples and ejaculates from 615 randomly selected Pietrain boars were analysed. Statistical analysis revealed a significant effect ( P P  = 0.0262) of DR × H × A on the presence of parasites. Sperm output was significantly affected ( P