Relationship between N-acetyl-beta-D-glucosaminidase activity and cell count, lactose, chloride, or lactoferrin in cow milk.
Activity of N-acetyl-beta-D-glucosaminidase was measured in foremilk samples collected from cows. A total of 64 samples were collected from these cows, some of which were affected by mastitis. They were examined for N-acetyl-beta-D-glucosaminidase activity, cell count in whole milk, and milk chloride, lactose, and lactoferrin. The correlation coefficient was .72 between activity and cell count, -.80 between activity and lactose, and .88 between activity and chloride. Therefore, the correlations between N-acetyl-beta-D-glucosaminidase activity and milk components, chloride and lactose, were larger than that between N-acetyl-beta-D-glucosaminidase activity and cell count. The correlation coefficient was high (.91) between N-acetyl-beta-D-glucosaminidase and lactoferrin. The N-acetyl-beta-D-glucosaminidase activity in cow's milk has potential for diagnosis of mastitis.
D000118:Acetylglucosaminidase / Q000378:metabolism*; D000818:Animals; D002417:Cattle; D002452:Cell Count / Q000662:veterinary; D002712:Chlorides / Q000378:metabolism*; D004796:Clinical Enzyme Tests / Q000662:veterinary; D005260:Female; D006596:Hexosaminidases / Q000378:metabolism*; D007781:Lactoferrin / Q000378:metabolism*; D007782:Lactoglobulins / Q000378:metabolism*; D007785:Lactose / Q000378:metabolism*; D008414:Mastitis, Bovine / Q000175:diagnosis / Q000378:metabolism*; D008892:Milk / Q000166:cytology / Q000378:metabolism*
D002712:Chlorides; D007782:Lactoglobulins; D006596:Hexosaminidases; D000118:Acetylglucosaminidase; D007781:Lactoferrin; D007785:Lactose