Table 7.
The effect of the butyric acid and α-monolaurin, with and without the inclusion of antibiotic growth promoters (AGP), on crypt depth (µm) of the duodenum, jejunum and ileum of broilers at 33 days of age (± standard error of the mean).
| Intestinal Segments | Treatment | Without AGP α | With AGP α | Mean |
|---|---|---|---|---|
| Duodenum | No additives | 364.16 (±48.57) | 425.80 (±48.57) | 394.98 (±34.35) |
| Butyric acid # | 356.92 (±48.57) | 382.52 (±48.57) | 369.72 (±34.35) | |
| Monolaurin * | 352.21 (±48.57) | 314.11 (±48.57) | 333.16 (±34.35) | |
| Butyric acid # + Monolaurin * | 288.33 1 (±48.57) | 434.25 2 (±48.57) | 361.29 (±34.35) | |
| Mean | 340.40 (±24.29) | 389.17 (±24.29) | ||
| Jejunum | No additives | 376.84 a (±33.15) | 327.45 ab (±33.15) | 352.14 (±23.44) |
| Butyric acid # | 308.37 ab (±33.15) | 296.56 ab (±33.15) | 302.47 (±23.44) | |
| Monolaurin * | 341.36 ab1 (±33.15) | 239.68 b2 (±33.15) | 290.52 (±23.44) | |
| Butyric acid # + Monolaurin * | 278.79 b (±33.15) | 351.37 a (±33.15) | 315.08 (±23.44) | |
| Mean | 326.34 (±16.57) | 303.77 (±16.57) | ||
| Ileum | No additives | 316.49 a (±19.49) | 275.44 (±19.49) | 295.96 a (±13.79) |
| Butyric acid # | 276.11 ab (±19.49) | 278.11 (±19.49) | 277.11 ab (±13.79) | |
| Monolaurin * | 279.09 ab (±19.49) | 232.29 (±19.49) | 255.69 b (±13.79) | |
| Butyric acid # + Monolaurin * | 229.70 b (±19.49) | 271.04 (±19.49) | 250.37 b (±13.79) | |
| Mean | 275.35 (±9.75) | 264.22 (±9.75) |
α Antibiotic growth promoter: zinc bacitracin 15% (0.5 g/kg); # Novyrate®C (starter 1 g/kg, grower 0.75 g/kg, finisher 0.25 g/kg); * FRA® C12 Dry (1 g/kg); a,b column means per intestinal segment with a distinctive superscript differ significantly (p < 0.05); 1,2 row means with a distinctive superscript differ significantly (p < 0.05).