Abstract
THE most characteristic biochemical change associated with the disorder of cattle known variously as grass staggers, lactation or nutrition tetany and Hereford disease is a fall in the blood-serum magnesium concentration from a normal value within the range 2.0–3.5 mgm./100 ml. to one of 0.7 mgm. or less. The disorder has its highest incidence in milking cows in spring, shortly after a change from winter rations to the grazing of pasture, and under such conditions frequently the fall in serum magnesium concentration is rapid; in extreme cases serum magnesium values of less than 0.7 mgm./100 ml. are observed within two days of the change of diet.
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Rook, J. A. F., Balch, C. C., and Line, C., J. Agric. Sci., 51, 189 (1958).
Rook, J. A. F., and Balch, C. C., J. Agric. Sci., 51, 199 (1958).
Blaxter, K. L., and McGill, R. F., Vet. Rev. and Annot., 2, 35 (1956).
Rook, J. A. F., and Campling, R. C., J. Agric. Sci., 53, 330 (1959).
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ROOK, J. Rapid Development of Hypomagnesæmia in Lactating Cows given Artificial Rations Low in Magnesium. Nature 191, 1019 (1961). https://doi.org/10.1038/1911019a0
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DOI: https://doi.org/10.1038/1911019a0
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