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Plasma iodine status in steers treated with iodine

Published online by Cambridge University Press:  24 November 2017

P.A.M. Rogers ,
J.A. Larkin  and
A.P. Moloney
P.A.M. Rogers
Affiliation:
Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland
J.A. Larkin
Affiliation:
Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland
A.P. Moloney
Affiliation:
Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland
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Extract

Twenty-four steers of low iodine (I) status were selected from a group of 40 of similar weight and type. Changes in plasma inorganic iodide (PII) levels in steers treated with I were examined in a randomised block experiment (Part 1 below). Relationships between PII, plasma total I (TOTI) and thyroxine (T4) levels were examined also (Part 2 below).

The trial began after a pre-treatment blood sampling (Pre) on Day 1. Selected steers (4 groups of 6 each) were assigned at random to individual stalls. Treatments were: C = no I supplement; D = a daily oral drench of 10 mg I (as potassium iodide)/100 kg liveweight (LW) on Days 1 to 7 inclusive; F = one application of 70 mg I (as Tincture of l)/100 kg LW to the flank fold on Day 1; L = intramuscular injection (1.1 ml/100 kg LW) of an oil-based iodine preparation (Lipiodol; 400 mg l/ml)) on Day 1.

Type
Ruminant Metabolism
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 189
Copyright
Copyright © The British Society of Animal Production 1993

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