Document Type : Articles
Author
Department of Anatomy and Histology/college of Veterinary Medicine/University of Diyala/Iraq
Abstract
In thymus, CD8 showed -ve expression at one week age. At one and two months old, strongly +ve were observed within the thymic parenchyma and around Hassall's corpuscles. At seven months old, CD8 showed variable degrees of +ve expression especially around blood vessels but less frequency than that of the younger ages due to the retarded activity of the thymus gland. CD268 cells showed –ve expressions in cortex and medulla of thymus at the 1st week of age . At the age of one month old Peacock the CD268 exhibited high degree of +ve appearance for B cells. At the age of two months old, CD268 displayed +ve expression in thymic cortex particularly around the septae. At age of seven months old Peacocks, the adult cellular population were formed the whole parenchyma of thymus gland therefore CD268 give slightly +ve expression in the cortex mainly around the septae. While in the spleen, CD8 were showed –ve expression at the age of one week Peacock poult . At the age of (1,2 and 7) months old spleen have great role in the immunity. CD268 indicated –ve expressions at one week of age, because of most of the cells at this age immatured. Few numbers of B lymphocytes were showing +ve expression at one month of age .At age of two months old Peacock B cells showed highly +ve expression. At age of seven months old Peacocks showed +ve expression, and highly increase in the number of mature B lymphocytes compared with other previous younger ages
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