Consistent with the findings of our study, Harrison et al. (1988) reported that feeding
YC stimulated the proportion of propionate at the expense of acetate proportion, and in their study, a parallel increase in the number of total anaerobic and cellulolytic bacteria in the rumen was observed. Additionally, inclusion of YC in the diet resulted in a higher increase in propionate than in acetate concentration. S. cerevisiae appears to stimulate lactate utilization
by Megasphera elsdenii and S. ruminantium