The Pathology of Marginal Vitamin A Deficiency in Calves
| Autor: | C.G. Woelfel, H.D. Eaton, J. H. L. Mills, Nielsen Sw |
|---|---|
| Rok vydání: | 1966 |
| Předmět: |
Vitamin
medicine.medical_specialty General Veterinary medicine.medical_treatment Carotene Retinol Biology medicine.disease Vitamin A deficiency chemistry.chemical_compound Cerebrospinal fluid Endocrinology chemistry Metaplasia Internal medicine medicine Cerebrospinal fluid pressure medicine.symptom Reticulum |
| Zdroj: | Research in Veterinary Science. 7:143-154 |
| ISSN: | 0034-5288 |
| DOI: | 10.1016/s0034-5288(18)34693-9 |
| Popis: | SUMMARY Forty-eight male Holstein calves averaging 79 days of age were fed 6 different levels (10, 20, 30, 40, 50 and 60 μg.) of carotene per pound of body weight daily at 2 caloric intakes for a 12 or a 24-week period. Papilloedema was present in 7 and pituitary cysts in 5 of 8 calves receiving 10 μg. daily. In the 8 calves receiving 20 μg. daily, 3 had marked, 1 slight papilloedema and 2 a cystic pituitary. Both groups had increased keratinization of prepuce, reticulum and rumen. Of the calves on the 30 μg. intakes, 2 had marked and 2 slight papilloedema and 1 a cystic pituitary. Calves on higher carotene levels hadinconsistent changes. The pathological changes correlated well with the low vitamin A content of the liver, the increased cerebrospinal fluid pressures and the parotid duct metaplasia, reported previously. |
| Databáze: | OpenAIRE |
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