Abstract
Isopropyl alcohol (IPA), produced from acetone by rumen bacterial action, was infused into the rumen of three female goats kept in a climatically controlled experimental room during feeding to investigate the mechanism and roles of IPA in ruminating behavior (number of boli and ruminating time). The ruminating behavior measured by the number of boli, ruminating time, number of remastications, and remasticating time increased (p<0.05) with intraruminal IPA infusion. The concentrations of IPA and acetone in the rumen and the plasma significantly increased (p<0.05) during intraruminal IPA infusion. These data suggest that rumination receptors sensitive to IPA and acetone may be in an area such as the rumen epithelium and the brain stem where they can respond to metabolite levels. (Asian-Aust. J. Anim. Sci. 2002. Vol 15, No. 8 : 1134-1138)
Highlights
In the blood and rumen increase with an increase in ketosis in cows that have intensified symptoms from subclinical to clinical, and Isopropyl alcohol (IPA) may form in the rumen from acetone by rumen bacterial action (Thin and Robertson, 1959)
We consider that the increases in plasma acetone in the blood circulation were due to activity of alcohol dehydrogenase (ADH) in the liver
IPA absorbed from the rumen wall was circulated to the liver where the IPA was oxidized to acetone by alcohol dehydrogenase, and passed into the blood circulation
Summary
In the blood and rumen increase with an increase in ketosis in cows that have intensified symptoms from subclinical to clinical, and IPA may form in the rumen from acetone by rumen bacterial action (Thin and Robertson, 1959). The concentrations of IPA and acetone in the rumen and the plasma significantly increased (p
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