EFFECT OF ANTIBIOTIC FEED ADDITIVES ON THE LEVEL OF SKATOLE IN FAT OFMALE PIGS

The aim of this work was to evaluate the effect of the antibiotic feed additives, Tylosin and Virginiamycin, on skatole levels in fat of ent ire male pigs and performance. The experimental material consisted of thirty-one litters each of 3 male pigs. The following treatments were tested from 60 kg to slaughter at 100 kg live weight: Treatment 1: con trol feed, without antibiotic feed additive or other growth promoter, Treatment 2: control feed + 20 ppm Virginiamycin, Treatment 3: control feed + 20 ppm Tylosin. The pigs were penned individually and fed ad l ib. until slaughter. There were no significant differences between the two treatments Virginiamycin and Tylosin and the control treatment fo r skatole concentration in neckfat (male off-odor) at slaughter, daily gain, feed conversion ratio and meat percentage.