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Journal of Dairy Science Vol. 33 No. 1 81-86
© 1950 by American Dairy Science Association ®
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Parturient Paresis. V. Blood Serum Levels of Citric Acid and Calcium in Normal Parturient Cows and Cows with Parturient Paresis1

T. H. Blosser and Vearl R. Smith

Department of Dairy Husbandry, University of Wisconsin

ABSTRACT

Blood serum citric acid and calcium analyses were run on twenty-two Jersey, six Guernsey and four Holstein cows from 10 days prepartum to 10 days post-partum. There were no significant differences in blood serum citric acid between breeds or between prepartum and non-prepartum-milked cows. There was a highly significant correlation between blood serum citric acid and calcium over this period of time. Serum citric acid levels did not show any appreciable change between 3 and 1 days prepartum, but there was a definite drop in both milk fever and normally calving cows between 1 day prepartum and 1 day postpartum. This drop was of greater magnitude in milk fever than in normal cows.

Following parturition, serum citric acid levels increased in normally calving cows and decreased in cows which developed milk fever. Part of this difference in behavior can be attributed to relapses which occurred in several of the cows with milk fever.

FOOTNOTES

1 These data were taken from a thesis presented by the senior author to the faculty of the Graduate School, University of Wisconsin, in partial fulfillment of the requirements for the degree of Doctor of Philosophy. Published with the approval of the Director of the Wisconsin Agricultural Experiment Station.

2 Present address, Division of Dairy Husbandry, the State College of Washington, Pullman.






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Copyright © 1950 by the American Dairy Science Association ®.