Comparative Cellular Structure of Udder and Teat of Desi and Crossbred Cows in Reference to Mammary Gland Immunity

Abstract

The present study was conducted on teat and udder of desi (Indian zebu) and crossbred cows. The number of lobules were more in crossbred as compare to desi cows. The shape of the alveoli was round or oval in desi cow and pentagonal or hexagonal in outline in crossbred cows. The number of alveoli was 160-195 and 120-150 with an average diameter of 111.92±3.04 µ and 90.72±3.21 µ in case of crossbred and desi cows, respectively. Thickness of the inter alveolar barrier among the adjacent alveoli was about 12 µ in desi cows and 6 µ in crossbred cows. Teat canal epithelium was thicker than the teat skin epithelium. The amount of keratin, the number of rosette and thickness of epithelium was more in desi cows.