鸡的法氏囊表面上皮的扫描电镜观察

SCANNING ELECTRON MICROSCOPY STUDY OF THE SURFACE EPITHELIUM OF BURSA OF FABRICIUS IN CHICKEN

扫描电镜观察鸡的法氏囊表面上皮形态变化的结果如下: 孵化第十三天的鸡胚,褶表面开始突起,法氏囊表面上皮起始分化成FAE和ISE两种不同的上皮细胞。两种表面上皮细胞的质膜上,均有分布均匀的微绒毛,FAE的微绒毛较粗大,ISE细胞的较细长。初生雏的法氏囊淋巴泸泡发达,FAE和ISE之间有明显的凹沟。前者的微绒毛较粗大而稀疏,后者的较细长而集密。一月龄的仔鸡法氏囊淋巴泸泡最发达,皮部的ISE与周围的ISE之间又形成一个凹沟。二月龄仔鸡法氏囊淋巴泸泡开始萎缩FAE也开始下陷,有的淋巴泸泡陷入间质中。 扫描电镜的观察,符合并证实了透射电镜观察表面上皮的形态变化。

By scanning electron microscopy, the epithelial buds bulging from the surface of the plicae were observed on the 13th day of incubation, At the same time the surface epithelium began to differentiate into follicle-associated epithelium (FAE) and interfollicular surface epithelium (ISE). Microvilli scattered evenly on the surface of the cells in these two kinds of epithelium, and those on the cells of ISE were more slender than those of FAE. The lymphoid follicles of the bursa of Fabricius developed well in the newly hatched chicks, and there was a marked furrow between FAE and ISE. When the chicken was at the age of one month, the lymphoid follicles were fully developed and their cortex and medulla were clearly differentiated. The lymphoid follcles of the bursa of Fabricius of the two months chick began to involute and some of the follicles embedded in the mesenchymatous tissue.