National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A study was conducted on the histology and histochemistry of oesophageal tonsils in 12 week-old White Leghorn chicken. The tonsil was located at the junction between oesophagus and proventriculus. In histological sections the tonsils with crypts were lined by stratified squamous epithelium infiltrated with numerous lymphocytes, plasma cells and macrophages in between. In the lamina propria, large number of tonsillar units were seen. These tonsillar units were composed of many large lymphoid nodules separated by internodular areas. It was surrounded by a connective tissue capsule. The epithelium lining the secretory portion of the mucosal glands of the oesophagus were transformed to lymphoepithelium with numerous lymphocytes. Acid-phosphatase (ACP) and alkaline phosphate (ALP) positive reaction was seen in the fibroblastic reticulum cell (FRC) in lamina propria. Alpha naphthyl acetate esterase (ANAE) activity was seen in the cytoplasm of T-lymphocytes and macrophages in the intercellular spaces between FAE and the basement membrane, internodular area and mantle zone of the lymphoid nodules. The esophageal tonsils offered immunological protection at the entrance of stomach.
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