Table 7.
Effects of probiotics on intestinal morphology of broilers (day 42) 1.
| Items | CON | CTC | PB | SEM | p-Value | |||
|---|---|---|---|---|---|---|---|---|
| Treatment 2 | CON vs. CTC | CON vs. PB | CTC vs. PB | |||||
| Duodenum | ||||||||
| Villus height (μm) | 1905 | 2234 | 2134 | 128 | 0.26 | 0.14 | 0.21 | 0.37 |
| Crypt depth (μm) | 269 | 172 | 181 | 26 | 0.07 | 0.06 | 0.09 | 0.26 |
| Villus height/ Crypt depth | 7.95 b | 13.10 a | 12.04 a | 1.19 | 0.05 | 0.03 | 0.04 | 0.64 |
| Jejunum | ||||||||
| Villus height (μm) | 1372 | 1561 | 1360 | 95 | 0.32 | 0.14 | 0.72 | 0.11 |
| Crypt depth (μm) | 253 | 195 | 177 | 35 | 0.34 | 0.16 | 0.11 | 0.61 |
| Villus height/ Crypt depth | 6.00 | 8.19 | 8.25 | 1.10 | 0.33 | 0.45 | 0.28 | 0.76 |
| Ileum | ||||||||
| Villus height (μm) | 1204 | 1103 | 1097 | 84 | 0.62 | 0.32 | 0.25 | 0.84 |
| Crypt depth (μm) | 159 | 138 | 105 | 20 | 0.25 | 0.36 | 0.14 | 0.62 |
| Villus height/ Crypt depth | 8.14 | 8.27 | 10.58 | 0.72 | 0.09 | 0.62 | 0.06 | 0.13 |
1 CON, control; CTC, chlorotetracycline (75 mg/kg); PB, probiotic (500 mg/kg in phase 1, 300 mg/kg in phase 2); SEM, standard error of the mean. 2 Treatment, the specific p value of the diet effect in the ANOVAs analysis. a,b values in the same row with different letters are significantly different at p < 0.05.