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Journal of Dairy Science Vol. 48 No. 7 942-946
© 1965 by American Dairy Science Association ®
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Lactation and Radionuclide Metabolism Responses of Dairy Cattle to Lethal Doses of Gamma and Neutron Radiation1

R. G. Cragle, J. K. Miller, E. W. Swanson and D. G. Brown

Agricultural Research Laboratory of The University of Tennessee, Oak Ridge2and Dairy Department, University of Tennessee, Knoxville

ABSTRACT

Seven lactating dairy cows were irradiated, to study the effects of lethal doses of gamma and neutron radiation on subsequent lactation. Irradiation effects on radioiodine and radiostrontium metabolism also were studied. Gamma-irradiated cows continued to eat and to produce milk of normal composition at moderately reduced rates for 12–14 days post-irradiation, at which time a general systemic infection occurred, milk secretion and feed intake ceased, and the animals died in three or four days. Radioiodine and radiostrontium concentrations were less in the milk from irradiated animals than from nonirradiated control cows. Immediately after irradiation the neutron-treated cows exhibited a drastically reduced feed intake and milk production dropped sharply. Two of these animals died 20 and 40 days post-irradiation, respectively. Similar rad doses for gamma and neutron treatments were given in 21.8 and 0.43 hr, respectively.

FOOTNOTES

1 This manuscript is published with the permission of the Director of the University of Tennessee Agricultural Experiment Station, Knoxville.

2 Operated by the Tennessee Agricultural Experiment Station for the U. S. Atomic Energy Commission under Contract No. AT-40-1-GEN-242.






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Copyright © 1965 by the American Dairy Science Association ®.