Figure 5.

Effects of Z. Tk and ZnO on the intestinal microbiota structure at the phylum level in weaned piglets characterized by the taxonomic distributions of the microbial communities in feces at phylum level (A), the top five relatively abundant bacterial phyla detected in fecal samples (B), and the Firmicutes/Bacteroidetes ratio (F/B; C). Symbol “*” indicates the significant difference set at the values of p of 0.05. Each of the nine samples is selected from each of the three groups of piglets, i.e., the positive control (PC), the negative control (NC), and the test groups, on days 21 and 35, respectively.