J. Anim Sci.
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J. Anim Sci. 1963. 22:86-92.
© 1963 American Society of Animal Science
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Relative Effectiveness of Various Anti-Foaming Agents for Pasture Bloat Therapy1

H. H. Van Horn, Jr., S. M. Kassir2, N. L. Jacobson, P. R. Shellenberger, D. K. Hotchkiss and R. S. Allen

Iowa State University, Ames

Abstract

Two hundred twenty-one cases of pasture bloat were employed to compare the effectiveness of the following treatments: crude soybean oil, emulsified soybean oil (three methods of administration), emulsified lard oil, the lard oil emulsifier and the soybean oil emulsifier. Although bloat normally was reduced following administration of each of the oils, emulsified soybean oil by stomach tube into the dorsal rumen was the most consistent in promoting rapid recovery.

A stomach tube with a 3/4-in. inside diameter was more effective than a tube with a 1/2-in. lumen in releasing free gas and was more suitable for introduction of anti-foaming agents into the rumen.

The effectiveness of the various anti-foaming agents when evaluated in an in vitro foam measuring device was similar in most instances to that observed in vivo.

The most stable emulsions of soybean oil were obtained with 3% lecithin (2% in the oil and 1% added) in crude soybean oil and 4% lecithin (all added) in refined soybean oil. Storage at room temperature enhanced stability of the emulsion whereas refrigeration promoted degradation of the emulsion. An antioxidant had no apparent effect on stability of the emulsion.

Footnotes

1 Journal Paper No. J-4372 of the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa. Project No. 1267. Supported in part by funds provided by the Iowa State University Research Foundation.

2 Present address: Animal Husbandry Dept., Abu-Ghraib Expt. Station, Abu Ghraib, Republic of Iraq.






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