title: Histological and enzyme histochemical investigation of the hemal nodes of the hair goat.
abstract: We investigated the structure of the hemal node in six healthy hair goats using histological and enzyme histochemical methods. After processing, tissue sections were stained with Crossman's trichrome, Gordon-Sweet's silver and Pappenheim's panoptic stains. Alpha-naphthyl acetate esterase (ANAE) and acid phosphatase (ACP-ase) were demonstrated in frozen sections. Hemal nodes were encapsulated by connective tissue and few smooth muscle cells. Several trabeculae originated from the capsule and extended into the hemal node. A subcapsular sinus was present beneath the capsule and was continuous with the deeper sinuses. Subcapsular and deep sinuses were filled with erythrocytes. The parenchyma consisted of lymphoid follicles, diffuse interfollicular lymphocytes and irregular wide lymphoid cords. Cortical and medullary regions were not distinct. ANAE (+) and ACP-ase (+) cells were located mainly in the germinal centers of the lymphoid follicles and also were scattered equally in the interfollicular region and lymphoid cords. Monocytes, macrophages and reticular cells displayed a diffuse positive reaction, whereas localized granular positivity was observed in lymphocytes. We demonstrated that the general structure of the hair goat hemal nodes is similar to that of other ruminant species.
authors.affiliation: Department of Histology and Embryology, Faculty of Veterinary Medicine, University of Selcuk, Campus, Konya, Turkey. ttelatar@selcuk.edu.tr
authors.forename: T
authors.initials: T
authors.lastname: Ozaydin
authors.forename: E
authors.initials: E
authors.lastname: Sur
authors.forename: I
authors.initials: I
authors.lastname: Celik
authors.forename: Y
authors.initials: Y
authors.lastname: Oznurlu
authors.forename: M F
authors.initials: MF
authors.lastname: Aydin
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism*; D000818:Animals; D018858:Germinal Center / Q000737:chemistry / Q000166:cytology / Q000201:enzymology; D006041:Goats / Q000033:anatomy & histology* / Q000276:immunology; D006651:Histocytochemistry / Q000379:methods; D008198:Lymph Nodes / Q000737:chemistry* / Q000166:cytology / Q000201:enzymology; D008214:Lymphocytes / Q000737:chemistry / Q000166:cytology / Q000201:enzymology; D008264:Macrophages / Q000737:chemistry / Q000166:cytology; D009283:Naphthol AS D Esterase / Q000378:metabolism*; D013194:Staining and Labeling / Q000379:methods
chemical_list: D009283:Naphthol AS D Esterase; D000135:Acid Phosphatase