Table 6.
Effect of dietary inclusion of an organic acids-based formulation (OABF) and avilamycin dietary inclusion on cecal digesta microbiota (log cells/g wet digesta content) of 42-day-old broilers.
| Item | Total bacteria | Bacteroides spp. | Lactobacillus spp. | Bifidobacterium spp. | Escherichia coli | Clostridium perfringens subgroup |
Clostridium leptum subgroup |
Clostridium coccoides subgroup |
||
|---|---|---|---|---|---|---|---|---|---|---|
| Main effect | ||||||||||
| OABF1 | No | 10.12 | 9.52 | 7.08 | 5.37 | 7.13 | 7.03 | 9.28 | 9.25 | |
| Yes | 10.20 | 9.61 | 7.17 | 5.26 | 7.16 | 7.32 | 9.47 | 9.40 | ||
| Avilamycin2 | No | 10.16 | 9.57 | 7.14 | 5.46 | 7.02 | 7.15 | 9.36 | 9.32 | |
| Yes | 10.16 | 9.56 | 7.11 | 5.18 | 7.28 | 7.20 | 9.38 | 9.33 | ||
| Treatments 3 | ||||||||||
| CON | 10.07 | 9.47 | 7.01 | 5.50 | 7.03 | 6.97 | 9.24 | 9.18 | ||
| OA | 10.25 | 9.67 | 7.27 | 5.41 | 7.00 | 7.32 | 9.49 | 9.46 | ||
| OAAV | 10.14 | 9.55 | 7.07 | 5.11 | 7.32 | 7.32 | 9.45 | 9.34 | ||
| AV | 10.17 | 9.56 | 7.15 | 5.24 | 7.23 | 7.08 | 9.31 | 9.32 | ||
| Statistics | ||||||||||
| SEM4 | 0.067 | 0.084 | 0.244 | 0.258 | 0.173 | 0.197 | 0.077 | 0.070 | ||
| PO | 0.270 | 0.278 | 0.711 | 0.654 | 0.854 | 0.143 | 0.018 | 0.040 | ||
| PA | 0.943 | 0.875 | 0.904 | 0.291 | 0.147 | 0.773 | 0.831 | 0.886 | ||
| PO×A | 0.127 | 0.213 | 0.502 | 0.940 | 0.726 | 0.756 | 0.437 | 0.071 | ||
1
No: no OABF addition; Yes: addition of 1 g OABF/kg diet.
2
No: no avilamycin addition; Yes: addition of 2.5 mg of avilamycin/kg diet.
3
Interaction means from 8 replicate pens per treatment. Treatments include: control – no additions (CON), 1 g OABF/kg diet (OA), avilamycin 2.5 mg active components/kg diet (AV) and combination of OA + AV (OAAV).
4
Pooled standard error of means.