Table 3.
Effects of Paenibacillus xylanexedens ysm1 on intestinal morphology of the jejunum and ileum on days 14 and 28.1
| Dietary treatment2 |
||||||
|---|---|---|---|---|---|---|
| Item | NC | PC | PRO | ANT | SEM | P-value |
| Day 14 | ||||||
| Jejunum | ||||||
| Villus height (μm) | 496.8 | 455.6 | 485.1 | 487.9 | 6.78 | 0.154 |
| Crypt depth (μm) | 86.38 | 79.38 | 82.00 | 80.75 | 1.43 | 0.351 |
| VH:CD3 | 5.77 | 5.75 | 6.01 | 6.05 | 0.10 | 0.653 |
| Ileum | ||||||
| Villus height (μm) | 380.1a | 357.9b,c | 351.4c | 374.6a,b | 3.44 | 0.004 |
| Crypt depth (μm) | 68.64a,b | 67.94b | 73.20a | 72.93a | 0.73 | 0.006 |
| VH:CD | 5.54a | 5.28a,b | 4.80c | 5.14b,c | 0.06 | <0.001 |
| Day 28 | ||||||
| Jejunum | ||||||
| Villus height (μm) | 1,067a | 910.4c | 985.1b | 1016a,b | 13.58 | <0.001 |
| Crypt depth (μm) | 108.0a | 90.21d | 96.10c | 101.7b | 1.33 | <0.001 |
| VH:CD | 9.89 | 10.09 | 10.25 | 9.99 | 0.08 | 0.414 |
| Ileum | ||||||
| Villus height (μm) | 532.8a | 413.9b | 511.8a | 521.3a | 9.07 | <0.001 |
| Crypt depth (μm) | 95.43a | 80.05c | 91.06b | 95.11a | 1.16 | <0.001 |
| VH:CD | 5.58a | 5.17b | 5.62a | 5.48a,b | 0.05 | 0.003 |
a–d
Means with different superscripts in the same row are significantly different (P < 0.05).
1
Data represent mean values of 8 replicates per treatment.
2
NC: birds fed a basal diet and not challenged with Escherichia coli K88; PC: birds fed a basal diet and orally challenged with of E. coli K88; PRO: birds fed a diet supplemented with 1 × 109P. xylanexedens ysm1 cfu/kg feed and orally challenged with E. coli K88; ANT: birds fed a diet supplemented with 20 mg of colistin sulfate/kg of feed and orally challenged with E. coli K88.
3
Villus height to crypt depth ratio.