| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Laboratory of Dairy Science, Institute of Food Science, Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland
2 Swiss Federal Dairy Research Station, Liebefeld, CH-3003 Bern, Switzerland
From cows that had both healthy quarters and quarters with subclinical mastitis [somatic cell count (SCC) 84,000 vs. 293,000/ml in bucket milk], foremilk, bucket milk, and stripping and residual milks were collected. Young milk was obtained 1.5 h later following a repeated oxytocin injection. Compared with milk from healthy quarters, milk from quarters with subclinical mastitis showed elevated SCC, plasminogen, and protein and had increased activity of n-Acetyl-ß-D-glucosaminidase (NAGase) and plasmin, as well as elevated portions of whey proteins and 
-casein in the total protein. The SCC and the other mentioned parameters were also higher in the foremilk and the stripping and residual milks compared with bucket milk, independent of the udder health status; however, decreased values were found for total protein. Young milk showed an increase of SCC and n-Acetyl-ß-D-glucosaminidase activity compared with bucket milk. Because of lower levels of total plasmin and -casein, we concluded that this young milk was newly synthesized milk containing some casein degradation products and that proteolysis of casein continued in the udder until the next milking. The n-Acetyl-ß-D-glucosaminidase activity was shown to be a better indicator for subclinical mastitis and correlated better with protein degradation than did SCC.
Key Words: milk fractions • subclinical mastitis • protein • casein degradation
Submitted on November 12, 1998
Accepted on May 10, 1999
This article has been cited by other articles:
|
|
 |
|
  Y. K. Park, H. C. Koo, S. H. Kim, S. Y. Hwang, W. K. Jung, J. M. Kim, S. Shin, R. T. Kim, and Y. H. Park The Analysis of Milk Components and Pathogenic Bacteria Isolated from Bovine Raw Milk in Korea J Dairy Sci, December 1, 2007; 90(12): 5405 - 5414. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Wu, S. Hu, and L. Cao Therapeutic Effect of Nisin Z on Subclinical Mastitis in Lactating Cows Antimicrob. Agents Chemother., September 1, 2007; 51(9): 3131 - 3135. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
N. I. Nielsen, T. Larsen, M. Bjerring, and K. L. Ingvartsen Quarter Health, Milking Interval, and Sampling Time During Milking Affect the Concentration of Milk Constituents J Dairy Sci, September 1, 2005; 88(9): 3186 - 3200. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Barnouin, M. Chassagne, S. Bazin, and D. Boichard Management Practices from Questionnaire Surveys in Herds with Very Low Somatic Cell Score Through a National Mastitis Program in France J Dairy Sci, November 1, 2004; 87(11): 3989 - 3999. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. Moussaoui, F. Vangroenweghe, K. Haddadi, Y. Le Roux, F. Laurent, L. Duchateau, and C. Burvenich Proteolysis in Milk During Experimental Escherichia coli Mastitis J Dairy Sci, September 1, 2004; 87(9): 2923 - 2931. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Leitner, U. Merin, and N. Silanikove Changes in Milk Composition as Affected by Subclinical Mastitis in Goats J Dairy Sci, June 1, 2004; 87(6): 1719 - 1726. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Leitner, M. Chaffer, A. Shamay, F. Shapiro, U. Merin, E. Ezra, A. Saran, and N. Silanikove Changes in Milk Composition as Affected by Subclinical Mastitis in Sheep J Dairy Sci, January 1, 2004; 87(1): 46 - 52. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C Michie, F Lockie, and W Lynn The challenge of mastitis Arch. Dis. Child., September 1, 2003; 88(9): 818 - 821. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C A MICHIE and J GILMOUR Breast feeding and the risks of viral transmission Arch. Dis. Child., May 1, 2001; 84(5): 381 - 382. [Full Text]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
