Studies on Quality Improvement of Raw Milk (V)

Changes on Nitrogen Distribution in Mastitic Milk

Abstract

The quarter milk from the Holstein cows was collected at random. The California Mastitis Test (CMT) was carried out for all the samples collected, and at the same time the nitrogen components were analyzed by using the Rowland's semi-quantitative method. The following results were obtained:
1) Total nitrogen contents in mastitic milk increased slightly as compared with normal milk.
2) Casein contents decreased considerably in mastitis.
3) Alubumin and globulin contents increased largely in mastitis; there was significant difference between normal and mastitic milk.
4) Other nitrogen contents increased slightly in mastitis.
5) Casein number was below 70% in mastitic milk, and there was significant difference between mastitic and normal milk.