Table-6.
Effects of heat and cold exposures for 7 days (post-hatch days 21-28) on the morphology of jejunum in broiler chickens subjected to thermal manipulation (TM) during embryogenesis (n=3).
| Day 7 of stress | Jejunum | |||||
|---|---|---|---|---|---|---|
| VH (µm) | VW (µm) | VSA (µm2) | CD (µm) | VH:CD(µm) | ||
| TN | Control | 826.93 ± 46.84 | 154.22 ± 17.19 | 395423 ± 20616 | 144.5 ± 17.69 | 5.95 ± 0.94ab |
| TML | 809.49 ± 72.79 | 153.6 ± 2.39 | 390563 ± 36146 | 167.74 ± 15.92 | 4.84 ± 0.18a | |
| TMH | 972.88 ± 55.1 | 152.7 ± 15.39 | 470638 ± 66996 | 186.53 ± 19.45 | 5.3 ± 0.46a | |
| CHS | Control | 1077.55 ± 179.38 | 127.55 ± 11.57 | 431846 ± 85276 | 124.89 ± 19.57 | 8.6 ± 0.19b |
| TML | 818.61 ± 21.61 | 145.4 ± 10.59 | 373906 ± 29725 | 152.05 ± 15.43 | 5.51 ± 0.63ab | |
| TMH | 912.91 ± 186.41 | 149.94 ± 8.37 | 431528 ± 95771 | 174.2 ± 34.75 | 5.29 ± 0.82a | |
| CCS | Control | 999.37 ± 131.72 | 147.4 ± 14.26 | 451968 ± 27685 | 177.68 ± 28.22 | 5.75 ± 0.6ab |
| TML | 1043.09 ± 105.68 | 148.26 ± 24.49 | 470046 ± 35167 | 195.93 ± 10.14 | 5.41 ± 0.85ab | |
| TMH | 1000.27 ± 20.17 | 146.97 ± 12.12 | 460470 ± 30553 | 146.33 ± 1.78 | 6.84 ± 0.1ab | |
TN: thermal neutral. CHS: chronic heat stress. CCS: chronic cold stress. VH: villus height. VW: villus width. VSA: villus surface area. CD: crypt depth. VH:CD: villus height to crypt depth ratio. a,bwithin the same column, means ± SEM with different superscripts are significantly different (p<0.05)