Histomorphological study on the teat (mammary papilla) of Indian buffalo

Abstract

Histomorphological studies on buffalo teat revealed that its epidermis was rich in melanin pigment, and devoid of hair follicle. The length of streak canal varied from 7.50 to 13.00 mm with an average of 9.80 ± 0.30 mm (mean ± SE). It was lined by stratified squamous keratinized epithelium. The average thickness of epithelium at mid streak canal region was 375.19 ± 4.80mu. Mitotic activity was frequent in stratum genninativum. The stratum granulosum showed high amount of keratohyaline granules. The. keratin layer was 154.70 ± 6.34 mu thick at mid streak canal region. The streak canal was surrounded by strong and compact smooth muscle sphincter which was rich in blood vessels and nerve fibres and have thickness of 382.50 ± 5.93 mu. The luminal and total diameters of streak canal were 1.046 ± 0.061 mm and 1.70 ± 0.07 mm respectively, The number of connective tissue folds in Furstenberg'S rosette ranged from 10 to 14. The epithelium of Furstenberg's rosette was stratified cuboidal to columnar. The subepithelial stroma was infiltrated by lymphocytes, monocytcs, polymorpho-nuclear leucocytes, mast cells, plasma cells and macrophagcs. Lymphoreticular tissue in the fonm of lymphoid nodules was seen in the upper part of rosetle. The mucosal folds were less in teat cistern than in rosette. The teat cistern was lined by 2 layers of cuboidal or colunmar epithelium and its lamina propria showed increased cellular infiltration.