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Journal of Dairy Science Vol. 46 No. 11 1236-1242
© 1963 by American Dairy Science Association ®
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Experimental Coliform (Aerobacter Aerogenes) Mastitis: Distribution of Whey Proteins During the Early Acute Phase1

E. J. Carroll, O. W. Schalm and J. Lasmanis

Department of Clinical Pathology, University of California, Davis

ABSTRACT

Two trials involving inoculation of lactating quarters of one cow with large numbers of Aerobacter aerogenes are described. Only a mild reaction occurred following the first inoculation. Acute mastitis was produced in the second, with agalactia resulting in all quarters by the fourth milking after exposure. All glands returned to full normal production by 2 wk. In both trials, evidence of increased permeability between blood and milk (increased pH, chlorides, serum albumin, and immune globulin) took place within 3 hr. Serum albumin declined rapidly to normal levels, but the immune globulin fraction remained elevated. Following the period of agalactia, a protein here designated X, with a paper electrophoretic mobility intermediate between {alpha}-lactalbumin and immune globulin, appeared. The X protein ultimately completely masked {alpha}-lactalbumin and comprised as much as 50% of the total whey protein. It disappeared from whey after the glands returned to full milk production. A similar protein was also found in wheys obtained from cows early in the dry phase of lactation. It did not appear to have the paper electrophoretic mobility of any of the major electrophoretic components of blood or milk. It was postulated the X protein was of cellular origin.

FOOTNOTES

1 Supported in part by the Animal Disease and Parasite Research Division, Agricultural Research Service, U. S. Department of Agriculture.






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Copyright © 1963 by the American Dairy Science Association ®.