Table 3.
Effects of Bacillus subtilis on intestinal morphology of broilers at 42 d of age.
| Items | Groups |
SEM |
P-value |
||||
|---|---|---|---|---|---|---|---|
| NC | PC | BS | NC-BS | NC-PC | PC-BS | ||
| Duodenum | |||||||
| Crypt depth (μm) | 235 | 216 | 246 | 12 | 0.730 | 0.560 | 0.388 |
| Villus height (μm) | 1,279 | 1,107 | 1,342 | 57 | 0.642 | 0.243 | 0.133 |
| VCR | 5.5 | 5.3 | 5.8 | 0.33 | 0.709 | 0.781 | 0.548 |
| Jejunum | |||||||
| Crypt depth (μm) | 237 | 220 | 215 | 10 | 0.439 | 0.532 | 0.855 |
| Villus height (μm) | 1,152 | 1,221 | 1,306 | 64 | 0.369 | 0.668 | 0.618 |
| VCR | 4.9 | 5.8 | 6.3 | 0.36 | 0.156 | 0.317 | 0.617 |
| Ileum | |||||||
| Crypt depth (μm) | 202 | 186 | 150 | 15 | 0.165 | 0.659 | 0.329 |
| Villus height (μm) | 944 | 885 | 941 | 40 | 0.981 | 0.577 | 0.593 |
| VCR | 4.7b | 5.5a,b | 6.4a | 0.35 | 0.047 | 0.328 | 0.268 |
a,bMeans in the same row with different superscripts are significantly different at P < 0.05. Values are expressed as means with pooled SEM values, n = 6.
Abbreviations: BS, Bacillus subtilis group; NC, negative control group; PC, positive control group; VCR, villus height to crypt depth ratio.