JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Journal of Dairy Science Vol. 58 No. 4 526-531
© 1975 by American Dairy Science Association ®
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Miller, J. K.
Right arrow Articles by Lyke, W. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Miller, J. K.
Right arrow Articles by Lyke, W. A.

Effect of Thyroid Status and Thiocyanate on Absorption and Excretion of Iodine by Cattle1

J. K. Miller, B. R. Moss2, E. W. Swanson and W. A. Lyke

Comparative Animal Research Laboratory, Oak Ridge, TN 37830
, and Department of Animal Science, University of Tennessee, Knoxville 37901

ABSTRACT

Effects of thyroidectomy or iodine-131, thyroprotein feeding, and thiocyanate dosing on radioiodine metabolism in the bovine were studied in 34 animals. Two thyroidectomized calves excreted 44% more radioiodine in urine and 38% less in feces than two thyroid-intact calves. Oral thiocyanate increased urinary radioiodine 32% in thyroidectomized and 46% in intact calves while reducing fecal radioiodine 48% in thyroidectomized and 11% in intact calves. Urinary radioiodine clearance of two heifers was increased 52% by thiocyanate, but urine flow was not affected. Percentages of radioiodine doses cycled through the abomasum daily and recovered from digestive tracts at slaughter, respectively, were: 12 thyroid-intact cows, 468 and 77; two intact cows fed 10 g sodium thiocyanate daily, 64 and 41; 10 thyroid-damaged cows, 506 and 149; and four thyroid-damaged cows fed 8 g thyroprotein daily, 372 and 93. Thyroid damage had little effect on gastric radioiodine secretion but increased total digestive tract radioiodine because of greater volume of tract contents. Inhibition of gastric radioiodine secretion by thiocyanate reduced the digestive tract radioiodine pool. The digestive tract iodine pool may conserve iodine by reducing loss in urine.

FOOTNOTES

1 Research sponsored by the U. S. Atomic Energy Commission under Contract No. AT-40-1-GEN-242 with the University of Tennessee.

2 Present address: Animal and Range Sciences Department, Montana State University, Bozeman 59715.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1975 by the American Dairy Science Association ®.