HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Bruning, C. L. Articles by Yokoyama, M. T. Search for Related Content PubMed PubMed Citation Articles by Bruning, C. L. Articles by Yokoyama, M. T.

Characteristics of Live and Killed Brewer's Yeast Slurries and Intoxication by Intraruminal Administration to Cattle^1,2,

Michigan State University, East Lansing 48824-1225

Abstract

The physical and nutritional characteristics of live and killed brewer's yeast slurries and the possible toxicity of intraruminal administration of loading doses of these by-products were evaluated. Dry-matter (DM) percentages of live brewer's yeast slurry ranged from 10.5 to 29.0, and DM percentages of killed brewer's yeast slurry ranged from 14.6 to 18.5. Total crude protein (N x 6.25) percentages of live and killed yeast slurries (DM basis) were 44.1 and 43.1; ethanol percentages (wet basis) were 6.96 and 1.84, respectively. Phase contrast photomicrographs showed distinct differences in morphology between live and killed yeast cells. Intraruminal administration of loading doses (0, 2.3, 4.5 and 6.8 kg) of live and killed brewer's yeast slurries to bull calves induced clinical intoxication at the 4.5-kg and 6.9-kg dosages of live brewer's yeast slurry. No toxicity was induced either with the killed brewer's yeast or with the 0-kg or 2.3-kg dose levels of live brewer's yeast slurry. The clinical signs and plasma ethanol concentrations suggested ethanol intoxication. Ruminal NH₃ concentrations increased to over 70 mg/dl with the 4.5-kg and 6.9-kg dosages of live brewer's yeast slurry, but they did not exceed 35 mg/dl with an equivalent dosage of killed brewer's yeast slurry.

¹ Michigan Agric. Exp. Sta., journal article no. 10740. Supported in part by the United States Brewers Association, Inc. and by Michigan Agric. Exp. Sta. project no. 1244.

² The technical assistance of S. L. Wiseley, E. L. Fink, W. R. Nummy and R. J. Cook is gratefully acknowledged.

This article has been cited by other articles:

				T. J. Klopfenstein, G. E. Erickson, and V. R. Bremer BOARD-INVITED REVIEW: Use of distillers by-products in the beef cattle feeding industry J Anim Sci, May 1, 2008; 86(5): 1223 - 1231. [Abstract] [Full Text] [PDF]