Table 2. Effects of supplemental antibiotic (AB) and bacteriophage (BP) on relative proportion of phylum and Firmicutes-to-Bacteroidetes ratio (F:B) in the ileal and fecal microbiota of growing pigs1)
| Item2) | Treatment | SEM | p-values |
| Control | AB3) | BP4) | Control vs. AB and BP | AB vs. BP |
| Ileum (%) |
| Actinobacteria | 4.5 | 4.9 | 10.3 | 3.1 | 0.395 | 0.179 |
| Bacteroidetes | 18.4 | 14.2 | 11.9 | 3.0 | 0.099 | 0.492 |
| Firmicutes | 60.5 | 68.7 | 68.8 | 3.6 | 0.059 | 0.987 |
| Proteobacteria | 5.9 | 6.6 | 3.8 | 1.8 | 0.686 | 0.172 |
| Others5) | 10.5 | 6.1 | 5.1 | 2.4 | 0.102 | 0.741 |
| Feces (%) |
| Actinobacteria | 5.2 | 2.3 | 2.6 | 1.3 | 0.056 | 0.867 |
| Bacteroidetes | 27.2 | 26.9 | 26.1 | 4.1 | 0.892 | 0.895 |
| Firmicutes | 56.9 | 60.0 | 59.4 | 3.5 | 0.525 | 0.900 |
| Proteobacteria | 2.5 | 2.9 | 4.2 | 0.9 | 0.275 | 0.226 |
| Others5) | 7.6 | 8.4 | 7.5 | 0.9 | 0.796 | 0.530 |
Each least squares mean represents 8 observations except the control diet (n = 7).
The taxa at the phylum level with more than 3% average proportion in all samples were selected.
Avilamix (avilamycin 20 g/kg, CTCBIO, Seoul, Korea) was supplemented at 0.1%.
BacterPhage (CTCBIO) was supplemented at 0.2%. The product contained a mixture of BP consisted of Clostridium perfringens types A and C, Escherichia coli (f41, k88, and k99), Salmonella spp. (Salmonella choleraesuis, Salmonella derby, Salmonella enteritidis, and Salmonella typhimurium), and Staphylococcus aureus. The BP product contained 109 plaque-forming units per gram.
Phylum less than 0.1% of the average in all groups.