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Journal of Dairy Science Vol. 47 No. 7 783-788
© 1964 by American Dairy Science Association ®
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Cisternal and Intraventricular Cerebrospinal Fluid Pressures in Chronic Bovine Hypervitaminosis A1

R. M. Grey, M. C. Calhoun, J. E. Rousseau, Jr., C. G. Woelfel, R. C. Hall, Jr., S. W. Nielsen, H. D. Eaton and J. J. Lucas2

Animal Industries and Animal Diseases Departments, Storrs (Conn.) Agricultural Experiment Station, Storrs

ABSTRACT

Eighteen Holstein male calves, average age 96 days and average plasma vitamin A 6.4 µg per 100 ml, were fed daily vitamin A intakes of either 18, 54, 4,000, or 12,000 µg per 454 g of live weight for 12 wk. Feed intake and growth were less in calves fed the two higher intakes. Clinical signs of hyper-vitaminosis A were observed in calves fed the 12,000 intake, but only hyperemia of the inguinal skin in calves fed 4,000. Total weight as well as weight per unit of live weight of the adrenals were greater in calves fed the two highest intakes. Cisternal and intraventricular cerebrospinal fluid pressures were lower in calves fed the two higher intakes, but within the individual calves the pressures at the two sites were not appreciably different. It is tentatively concluded that the lower pressures observed in the hypervitaminotic A calves were not due to obstruction or blockage, or both, between the ventricles and the cisternal subarachnoid space.

FOOTNOTES

1 Scientific contribution No. 82, Agricultural Experiment Station, University of Connecticut, Storrs. This study was supported in part by grant-in-aid funds provided by a PHS research grant, NB-02108-05, from the National Institute of Neurological Diseases and Blindness, Public Health Service, and by Wirthmore Feeds, Inc., Waltham, Massachusetts.

2 Station biometrician.






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Copyright © 1964 by the American Dairy Science Association ®.