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Online Journal of Veterinary Research

Volume 23 (4):255-261, 2019.

Histological and immuno-histochemical study of postnatal development

of Bursa of Fabricius in Turkeys (Meleagris Gallopavo).


Ahmed A Hussein1, Ali F Reshag2*


Department(s) of Anatomy and Histology, College(s) of Veterinary Medicine, 1University of Diyala, 2University of Baghdad, Iraq.




Hussein AA, Reshag AF., Histological and immune-histochemical study of postnatal development of Bursa of Fabricius in Turkeys (Meleagris Gallopavo), Onl J Vet Res., 23 (4):255-261, 2019. One week and 1, 2 and 7 month old turkeys were sacrificed and cloacal Bursa Fabricius tissue excised for histology and Immunohistochemistry. At 1 week, parenchyma was undistinguishable from cortex and medulla with pseudo stratified columnar and simple cuboidal epithelium. At 1 month, parenchyma differentiated from cortex and medulla by a cortical medullary junction with follicular and inter-follicular epithelium. By 2 months, structures were similar to 1 month. By 7 months, we observed involution and presence of cyst like structures in cortex and medulla. We found mature B lymphocytes within parenchyma of bursa at all ages. In turkeys, bursae are well developed by 1 month but may lose an immune role after puberty.


Key words: Bursa fabricus, turkey, B lymphocytes, cortex, Immunohistochemistry.