American Journal of Information Science and Technology

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Current View of the Significance of Yeast for Ruminants a Review 1- Role of Yeast and Modes of Action

Received: 15 April 2017    Accepted: 22 May 2017    Published: 20 July 2017
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Abstract

A variety of mechanisms have been suggested to explain changes in the activity of the rumen and improvements in performance when ruminants are fed yeast-based (Direct-Feed Microbials) DFMs. Yeast may have a buffering effect in the rumen by mediating the sharp drops in rumen pH which follows feeding of higher concentrate rations. Yeast may help to buffer excess lactic acid production when ruminants are fed high concentrate diets. At higher pH levels when feeding yeast caused increased numbers of rumen cellulolytic (cellulose digesting) bacteria and improvements in fiber digestion. Yeast fed has been shown to stimulate the growth and activity of rumen bacteria. Some products have high numbers of live yeast with low recommended feeding rates while other products suggest that live organisms are not required for beneficial effects and that the end products (metabolites produced by the yeast cells) are the active ingredients. Both types of yeast product have been reported to produce a variety of positive effects, especially, when fed to animals on a high forage diet.

DOI 10.11648/j.ajist.20170101.12
Published in American Journal of Information Science and Technology (Volume 1, Issue 1, December 2017)
Page(s) 8-14
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Yeast, Mode of Action, Rumen Activity, Bacteria, Animals

References
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[2] Chaucheyras-Durand, F.; N. D. Walker and A. Bachc (2008). Effects of active dry yeasts on the rumen microbial ecosystem: Past, present and future, Anim. Feed Sci. Technol., 145: 5-26.
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[6] Denev, S. A. (2006). Role of Lactobacilli in Gastrointestinal Ecosystem. Bulg. J. Agric. Sci. 12(1): 63-114.
[7] EU (EU Regulation 1831/2003). Opinion on the use of certain microorganisms as additives in feedingstuffs European Commission, Health & Consumer Protection Directorate-General, Scientific Opinions.
[8] Robinson, P. H. and L. J. Erasmus (2009). Effects of analyzable diet components on responses of lactating dairy cows to Saccharomyces cerevisiae based yeast products: A systematic review of the literature. Anim. Feed Sci. Technol., 149: 185-198.
[9] Ashour, G.; Habeeb, A. A.; Mourad, H. M. and Abo-Amer, A. A. (2009). Effect of yeast (Saccharomyces cerevisiae1026) ration supplementation on milk production and blood parameters of lactating baladi cows. Egypt. J. Basic Appl. Physio., 8(1): 237-254
[10] Pinos-Rodryguez, J. M., P. H. Robinson, M. E. Ortega, S. L. Berry. G. Mendozad and R. Barcena (2008). Performance and rumen fermentation of dairy calves supplemented with Saccharomyces cerevisiae 1077 or Saccharomyces boulardii 1079. Anim. Feed Sci. Technol., 140: 223-232.
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[12] Newbold, C. J., R. J. Wallace, and F. M. McIntosh. (1996). Mode of action of the yeast Saccharomyces cerevisiae as a feed additive for ruminants. Brit. J. Nutr. 76: 249-261.
[13] Auclair E. (2001). Yeast as an example of the mode of action of probiotics in monogastric and ruminant species. In: Brufau J. (ed.). Feed manufacturing in the Mediterranean region. Improving safety: From feed to food. Zaragoza: CIHEAM, Cahiers Options Méditerranéennes; n. 54: 45-53
[14] Dawson, K. A.; Newman, K. E. and Boling, J. A. (1990). Effect of microbial supplement containing yeast and lactobacilli on roughage fed ruminal microbial activities. J. Anim. Sci. 68: 3392 – 3398.
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[16] Tripathi, M.; Karim, S. (2011). Effect of yeast cultures supplementation on live weight change, rumen fermentation, ciliate protozoa population, microbial hydrolytic enzymes status and slaughtering performance of growing lamb. Livest. Sci., 135, 17–25.
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[21] Sauvant, D.; S. Giger-Reverdin and P. Schmidely (2004). Rumen acidosis: modeling ruminant response to yeast culture. In: Lyons, T. P., Jacques, K. A. (Eds.), Nutritional Biotechnology in the Feed and Food Industry. Nottingham University Press, Nottingham, pp. 221-229.
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Author Information
  • Department of Biological Applications, Radioisotopes Applications Division, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt

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    Alsaied Alnaimy Mostafa Habeeb. (2017). Current View of the Significance of Yeast for Ruminants a Review 1- Role of Yeast and Modes of Action. American Journal of Information Science and Technology, 1(1), 8-14. https://doi.org/10.11648/j.ajist.20170101.12

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    Alsaied Alnaimy Mostafa Habeeb. Current View of the Significance of Yeast for Ruminants a Review 1- Role of Yeast and Modes of Action. Am. J. Inf. Sci. Technol. 2017, 1(1), 8-14. doi: 10.11648/j.ajist.20170101.12

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    Alsaied Alnaimy Mostafa Habeeb. Current View of the Significance of Yeast for Ruminants a Review 1- Role of Yeast and Modes of Action. Am J Inf Sci Technol. 2017;1(1):8-14. doi: 10.11648/j.ajist.20170101.12

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  • @article{10.11648/j.ajist.20170101.12,
      author = {Alsaied Alnaimy Mostafa Habeeb},
      title = {Current View of the Significance of Yeast for Ruminants a Review 1- Role of Yeast and Modes of Action},
      journal = {American Journal of Information Science and Technology},
      volume = {1},
      number = {1},
      pages = {8-14},
      doi = {10.11648/j.ajist.20170101.12},
      url = {https://doi.org/10.11648/j.ajist.20170101.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajist.20170101.12},
      abstract = {A variety of mechanisms have been suggested to explain changes in the activity of the rumen and improvements in performance when ruminants are fed yeast-based (Direct-Feed Microbials) DFMs. Yeast may have a buffering effect in the rumen by mediating the sharp drops in rumen pH which follows feeding of higher concentrate rations. Yeast may help to buffer excess lactic acid production when ruminants are fed high concentrate diets. At higher pH levels when feeding yeast caused increased numbers of rumen cellulolytic (cellulose digesting) bacteria and improvements in fiber digestion. Yeast fed has been shown to stimulate the growth and activity of rumen bacteria. Some products have high numbers of live yeast with low recommended feeding rates while other products suggest that live organisms are not required for beneficial effects and that the end products (metabolites produced by the yeast cells) are the active ingredients. Both types of yeast product have been reported to produce a variety of positive effects, especially, when fed to animals on a high forage diet.},
     year = {2017}
    }
    

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    AB  - A variety of mechanisms have been suggested to explain changes in the activity of the rumen and improvements in performance when ruminants are fed yeast-based (Direct-Feed Microbials) DFMs. Yeast may have a buffering effect in the rumen by mediating the sharp drops in rumen pH which follows feeding of higher concentrate rations. Yeast may help to buffer excess lactic acid production when ruminants are fed high concentrate diets. At higher pH levels when feeding yeast caused increased numbers of rumen cellulolytic (cellulose digesting) bacteria and improvements in fiber digestion. Yeast fed has been shown to stimulate the growth and activity of rumen bacteria. Some products have high numbers of live yeast with low recommended feeding rates while other products suggest that live organisms are not required for beneficial effects and that the end products (metabolites produced by the yeast cells) are the active ingredients. Both types of yeast product have been reported to produce a variety of positive effects, especially, when fed to animals on a high forage diet.
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