Pigs in each diet group had very similar feed intakes over the study duration and there were no significant differences
in weight gain between the groups: for pigs in the CTR group average feed intake was 6.02±0.52 kg per pen/day, for the
PRO group 5.95±0.70 kg per pen/day, for the PRE group 6.28±0.54 kg per pen/day and for the SYN group 6.04±0.67 kg per
pen/day. For all challenge groups, animals showed mild diarrhoea and pyrexia at 2 days post challenge, that lasted for 3–4
days. Colonisation of the piglets by S. Typhimurium SL1344nalr, as assessed by selective culture of faeces, indicated that
the majority of piglets (five out of six piglets) in all experimental groups on day 1 after challenge were colonised. Shedding
thereafter was intermittent and sporadic and on average all treatment groups shed lower numbers of S. Typhimurium than
the control group