The study involved 52 Danish Landrace x Yorkshire piglets from 5 sows tested homozygote carriers of the dominant gene encoding for intestinal FA fimbriae receptors (van Haeringen Laboratorium bew.. Wageningen. The Netherlands). The piglets were weaned at an age of30+2 days at a body weight (Bw)of 7.84 0.05 kg.Two littermates of similar weight were housed in