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Experimental Pathology of Dairy Calves Ingesting One-Third the Daily Requirement of Carotene
Acta Veterinaria Scandinavica volume 8, pages 324–346 (1967)
Abstract
At 53 days of age, 30 male Holstein-Friesian calves were divided into 2 equal groups and fed for a 17 week period a ration containing either 15 µg (deficient) or 150 µg (control) of carotene per 0.45 kg of live-weight per day.
Twelve of the 15 deficient calves had an elevated cerebrospinal fluid pressure (GSFP), above 200 mm of saline. The mean GSFP of the deficient group was 3 times that of the control group. Fourteen of the 15 deficient calves had varying degrees of papilledema and 6 had hypophyseal cysts. The main parotid duct (Stensen’s duct) was affected by squamous metaplasia, in all the deficient calves.
The mean plasma carotenoid and vitamin A concentrations for the control calves were 5 times higher than the deficient animals. Liver carotenoid and vitamin A concentrations were markedly lower in the deficient calves and correlated well with elevated CSFP, papilledema and parotid duct metaplasia.
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Acknowledgments
Scientific Contribution No. 276, Agricultural Experiment Station, University of Connecticut. This study was supported, in part, by two PHS Research Grants, RO 1 NE-02108 from the National Institutes of Neurological Diseases and Blindness, and 5TIGM 985-02 from the Division of General Medical Sciences.
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Mills, J.H.L., Nielsen, S.W., Rousseau, J.E. et al. Experimental Pathology of Dairy Calves Ingesting One-Third the Daily Requirement of Carotene. Acta Vet Scand 8, 324–346 (1967). https://doi.org/10.1186/BF03547820
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DOI: https://doi.org/10.1186/BF03547820