Table 4.
Effect of dietary inclusion of an organic acids-based formulation (OABF) and avilamycin on ileal digesta microbiota (log cells/g wet digesta content) of 42-day-old broilers.
| Item | Total bacteria | Bacteroides spp. | Lactobacillus spp. | Escherichia coli |
Clostridium perfringens subgroup |
Clostridium leptum subgroup | Clostridium coccoides subgroup | |
|---|---|---|---|---|---|---|---|---|
| Main effect | ||||||||
| OABF1 | No | 8.12 | 5.76 | 7.43 | 5.90 | 6.42 | 5.44 | 6.71 |
| Yes | 8.13 | 5.92 | 7.46 | 6.10 | 6.68 | 5.48 | 6.94 | |
| Avilamycin2 | No | 8.11 | 5.98 | 7.58 | 6.23 | 6.88 | 5.52 | 6.88 |
| Yes | 8.14 | 5.69 | 7.30 | 5.77 | 6.22 | 5.41 | 6.77 | |
| Treatments3 | ||||||||
| CON | 8.05 | 5.84 | 7.47 | 6.21 | 6.85 | 5.45 | 6.88 | |
| OA | 8.17 | 6.12 | 7.70 | 6.25 | 6.90 | 5.58 | 6.88 | |
| OAAV | 8.09 | 5.72 | 7.22 | 5.95 | 6.45 | 5.38 | 7.00 | |
| AV | 8.19 | 5.67 | 7.38 | 5.58 | 5.98 | 5.44 | 6.54 | |
| Statistics | ||||||||
| SEM4 | 0.116 | 0.259 | 0.242 | 0.287 | 0.314 | 0.138 | 0.132 | |
| PO | 0.958 | 0.538 | 0.894 | 0.491 | 0.421 | 0.759 | 0.095 | |
| PA | 0.827 | 0.271 | 0.258 | 0.116 | 0.045 | 0.440 | 0.414 | |
| PO×A | 0.363 | 0.668 | 0.429 | 0.563 | 0.509 | 0.483 | 0.099 | |
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.