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Journal of Dairy Science Vol. 55 No. 10 1464-1469
© 1972 by American Dairy Science Association ®
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Serum Minerals, Leukocyte Profiles, and Plasma Corticoids in Dairy Heifers after an Injection of Corticotropin1

T. N. Wegner and G. H. Stott

Department of Dairy and Food Sciences, The University of Arizona, Tucson 85721

ABSTRACT

Adrenal response to corticotropin administration was studied in six Holstein heifers injected intramuscularly once with 250 IU of corticotropin. Blood was sampled at 0, .25, .50, .75, 1, 2, 4, 8, and 24 hr after injection and was analyzed for plasma corticoids, total leukocytes, differential leukocytes, scrum sodium, potasium, calcium, magnesium, and chloride. Plasma corticoids rose within 15 min and were associated with leukocytosis, lymphophenia, eosinopenia, hypernatremia, hyperchloremia, hypokalemia, hypomagnesemia, and hypocalcemia. Time-response and duration of these changes were compared as an index of adrenal activity.

FOOTNOTES

1 Arizona Agricultural Experiment Station Journal Article 1911.






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Copyright © 1972 by the American Dairy Science Association ®.