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The Structure of Bursa of Fabricius in the Struthio camelus
Wang Yonghui, Huang Likui, Liu Linyan, Liang Hongde, Jiao Xilan, Yang Yurong*
College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China
Abstract: To observe and compare the anatomical and histological structures of bursa of Fabricius of Struthio camelus and Gushi chickens， the bursa of Fabricius of 10-month-old healthy Struthio camelus and 45-day-old healthy Gushi chickens were observed by HE and immunohistochemistry staining， then the differences of anatomical and histological structures were analysed. The differences indicated that the bursa of Fabricius of Struthio camelus covered the dorsal wall of urodeum and coprodaeum， and the rounded fornix did not form a true sac and have no pedicle. Lymphoid follicles were visibly and densely distributed on the surface of mucosa and each lymphoid follicle attached to the trabecula and distributed singly， protruding to the cavity and forming a nodule. Lymphoid follicles were composed of a peripheral pars lymphoepithelialis (PLE) and a central pars lymphoreticularis (PLR). Corticomedullar bordering epithelium cells formed a layer between the PLE and the PLR. The mucosal epithelium of Struthio camelus was stratified columnar epithelium which translated to monolayer cells on the lymphoid follicles. A single lymphoid follicle area: dorsal wall
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