Department of Animal Health, Faculty of Animal Husbandry and Veterinary Sciences, University of Agriculture, Peshawar, Pakistan.
Department of Anatomy and Histology, Faculty of Biosciences, University of Veterinary and Animal Sciences, Lahore, Pakistan.
Probiotics Antimicrob Proteins. 2020 Jun;12(2):473-480. doi: 10.1007/s12602-019-09561-6.
Two-hundred-eighty-day-old broiler chicks were divided into seven groups. The groups were designated as T1, thermoneutral zone; T2, heat stressed (HS); T3, HS + zinc (Zn) supplementation (30 mg/kg); T4, HS + Zn (60 mg/kg); T5, HS + probiotic (0.1 g/kg); T6, HS + probiotic (0.1 g/kg) + Zn (30 mg/kg); and T7, HS + Zn (60 mg/kg) + probiotic (0.1 g/kg). Significant decrease (p < 0.05) was observed in villus height (VH), VH to crypt depth ratio, and villus surface area of all intestinal segments in the T2 group when compared with the T1 group. The same parameters had significantly higher (p < 0.05) values in the jejunum and ileum of the Zn- and probiotic-supplemented groups (alone + combination) when compared with the T2 group. The birds exposed to HS showed fewer (p < 0.05) intraepithelial lymphocytes (IELs) in the jejunum and ileum than the T1 group, while their count increased in the jejunum and ileum with dietary treatments. In conclusion, Zn and probiotic positively modulated the intestinal microstructures of broilers kept under high environmental temperature.
280 日龄肉鸡雏鸡被分为七组。这些组分别命名为 T1，常温区；T2，热应激（HS）；T3，HS + 锌（Zn）补充（30mg/kg）；T4，HS + Zn（60mg/kg）；T5，HS + 益生菌（0.1g/kg）；T6，HS + 益生菌（0.1g/kg）+ Zn（30mg/kg）；和 T7，HS + Zn（60mg/kg）+ 益生菌（0.1g/kg）。与 T1 组相比，T2 组所有肠段的绒毛高度（VH）、VH 与隐窝深度比和绒毛表面积均显著降低（p<0.05）。与 T2 组相比，Zn 和益生菌补充组（单独+组合）的空肠和回肠中相同参数的值显著升高（p<0.05）。暴露于 HS 的鸟类的空肠和回肠中的上皮内淋巴细胞（IELs）比 T1 组少（p<0.05），而在日粮处理中，其数量在空肠和回肠中增加。总之，Zn 和益生菌可积极调节高温环境下饲养的肉鸡的肠道微观结构。
