Effects of different treatments on the ileum microbiota (A) and the cecum microbiota (B) of early-weaned piglets. A(I), E. coli quantification in the ileum; A(II), Enterococcus quantification in the ileum; A(III), Lactobacillus quantification in the ileum. B(I), E. coli quantification in the cecum; B(II), Lactobacillus quantification in the cecum. Results are expressed as the mean of log10 colony forming units (cfu)/g digesta with standard deviations. Different lowercase letters denote statistical differences between groups (P < 0.05). Con., control; Antibotic, antibotic control; LL-EV, empty vector-expressing Lactococcus lactis; LL-pEGF, pEGF-secreting Lactococcus lactis.