In this study, an experiment was conducted to investigate the effects of two levels of Bacillus subtilis ATCC 6051a (BS), respectively Bacillus licheniformis ATCC 21424 (BL) administered as direct-fed microbial DFM probiotic bacteria on plasma biochemical profile of weaning piglets fed diets. A total of 100 piglets, 30±3 day-old, with initial average body weight (BW) of 8.53±0.17 kg were randomly distributed to 5 homogeneous groups (C, E1-BS 1%, E2-BS 3%, E3-BL 1%, E4-BL 3%,), 2 replicates/group with 10 piglets/pens, for 16 days of biological trial. The doses used were: 1% low dose in a concentration of 1.6 x 109 CFU spores g-1 feed, and 3% high dose in a concentration of 4.8 x 109 CFU spores g-1 feed. Results showed that BS supplementation affected plasma concentration of GGT (P<0.017), TG (P<0.048) and Mg (P<0.0001). No effect (P>0.05) as diet*day interaction on plasma metabolic profile was observed. In conclusion, administration of Bacillus spp. maintains the concentration of blood plasma parameters within the physiological ranges, without affecting the piglet’s health status.
