B. animalis AHC7 attenuates S. typhimurium induced NF-κB activation. Mice consumed placebo, B. animalis AHC7 or E. faecium for 3 weeks prior to S. typhimurium infection. Biophotonic imaging was performed on all animals at time 0 and 4 hours following infection. The increase in bioluminescence (i.e. NF-κB activation) from baseline (time 0) to 4 hours is illustrated for each group. *p < 0.05 versus placebo (n = 10 animals per group).