Enteric diseases frequently occur in rabbits during weaning period. However, it is widely known, that
the use of the antibiotic feed additives in the European Union was canceled in January 2006;
consequently, new alternatives are searched, for example phytoadditives, probiotics as well as
bacteriocins. In animal nutrition and medicine the species of the genus Enterococcus are the most
frequently utilized as probiotic microorganisms. Enterococci represent Gram-positive, facultative
anaerobic, lactic-acid bacteria (LAB) which belong to the normal intestinal flora in humans and
animals, including birds, reptiles or insects (Devriese et al., 1992). LAB are able to produce specific
substances termed bacteriocins – ribosomally synthesized antimicrobial peptides with activity directed
not only against closely related species (Nes et al., 1996, Lauková et al. 1993). Enterococci produce