• Yoon, I.K. (Department of Animal Science, University of Minnesota) ;
  • Stern, M.D. (Department of Animal Science, University of Minnesota)
  • 투고 : 1994.11.28
  • 심사 : 1995.06.20
  • 발행 : 1995.12.01


Direct-fed microbials (DFM) have been used to enhance milk production in lactating cattle and to increase feed efficiency and body weight gain in growing ruminants. Primary microorganisms that have been used as DFM for ruminants are fungal cultures including Aspergillus oryzae and Saccharomyces cerevisiae and lactic acid bacteria such as Lactobacillus or Streptococcus. Attempts have been made to determine the basic mechanisms describing beneficial effects of DFM supplements. Various modes of action for DFM have been suggested including : stimulation of ruminal microbial growth, stabilization of ruminal pH, changes in ruminal microbial fermentation pattern, increases in digestibility of nutrients ingested, greater nutrient flow to the small intestine, greater nutrient retention and alleviation of stress, however, these responses have not been observed consistently. Variations in microbial supplements, dosage level, production level and age of the animal, diet and environmental condition or various combinations of the above may partially explain the inconsistencies in response. This review summarizes production responses that have been observed under various conditions with supplemental DFM and also corresponding modification of ruminal fermentation and other changes in the gastrointestinal tract of ruminant animals.


Direct-Feed Microbials;Mode of Action;Ruminal Fermentation;Production Response;Ruminant

피인용 문헌

  1. Microbial status and rumen enzyme profile of crossbred calves fed on different microbial feed additives vol.34, pp.5, 2002,
  2. Desempenho de novilhos suplementados com sais proteinados em pastagem nativa vol.40, pp.8, 2005,
  3. Effects of Yeast Culture and Galacto-Oligosaccharides on Ruminal Fermentation in Holstein Cows vol.88, pp.4, 2005,
  4. Effect of Direct-Fed Microbials on Performance, Diet Digestibility, and Rumen Characteristics of Holstein Dairy Cows vol.90, pp.4, 2007,
  5. O157 and F5 vol.106, pp.2, 2009,
  6. Measurement and prediction of enteric methane emission vol.55, pp.1, 2011,
  7. Review: The use of direct fed microbials to mitigate pathogens and enhance production in cattle vol.91, pp.2, 2011,
  8. Effects of Dietary Addition of Bentonite and Probiotics on Meat Characteristics and Health of Hanwoo (Bos taurus coreanae) Steers fed Rice Straw As a Sole Roughage Source (a Field Study) vol.32, pp.4, 2012,
  9. In vitro assessment of ruminal fermentation characteristics of tropical browse mixtures supplemented with yeast vol.58, pp.1, 2012,
  10. ) to Improve Nutrients Availability of Diet with In Vitro Rumen Microbial Fermentation Test vol.33, pp.3, 2013,
  11. O157 in commercial feedlot cattle vol.93, pp.4, 2013,
  12. Evaluation of fermented Alisma canaliculatum with probiotics as potential feed additives for finishing Hanwoo (Bos taurus coreanae) steers vol.54, pp.8, 2014,
  13. Effect of Feeding a Mixed Microbial Culture Fortified with Trace Minerals on the Performance and Carcass Characteristics of Late-fattening Hanwoo Steers: A Field Study vol.28, pp.11, 2015,
  14. fermentation of cereal straws vol.87, pp.1, 2015,
  15. Performance of crossbred dairy Friesian calves fed two levels of Saccharomyces cerevisiae: intake, digestion, ruminal fermentation, blood parameters and faecal pathogenic bacteria vol.154, pp.08, 2016,
  16. Dietary supplementation of a bacteriocinogenic and probiotic strain of Enterococcus faecium CCM7420 and its effect on the mineral content and quality of Musculus longissimus dorsi in rabbits vol.56, pp.12, 2016,
  17. Effect of feeding mixed microbial culture fortified with trace minerals on ruminal fermentation, nutrient digestibility, nitrogen and trace mineral balance in Sheep vol.58, pp.1, 2016,
  18. Role of probiotics in rumen fermentation and animal performance: A review vol.7, pp.5, 2016,
  19. Effects of bacterial direct-fed microbials on ruminal fermentation, blood variables, and the microbial populations of feedlot cattle1,2 vol.80, pp.7, 2002,
  20. Effects of bacterial direct-fed microbials and yeast on site and extent of digestion, blood chemistry, and subclinical ruminal acidosis in feedlot cattle1,2 vol.81, pp.6, 2003,
  21. Effects of direct-fed microbial supplementation on digestibility and fermentation end-products in horses fed low- and high-starch concentrates1 vol.86, pp.10, 2008,
  22. Effect of disodium/calcium malate or Saccharomyces cerevisiae supplementation on growth performance, carcass quality, ruminal fermentation products, and blood metabolites of heifers1 vol.94, pp.10, 2016,
  23. Effects of Selected Lactobacillus plantarum as Probiotic on In vitro Ruminal Fermentation and Microbial Population vol.17, pp.3, 2018,
  24. Invitro Study on the Fluid From Banana Stem Bioprocess as Direct Fed Microbial vol.119, pp.1755-1315, 2018,
  25. In vitro study of postbiotics from Lactobacillus plantarum RG14 on rumen fermentation and microbial population vol.47, pp.0, 2018,
  26. Animal performance and nutrient digestibility of feedlot steers fed a diet supplemented with a mixture of direct-fed microbials and digestive enzymes vol.47, pp.0, 2018,
  27. Review: Enhancing gastrointestinal health in dairy cows pp.1751-732X, 2018,
  28. The role of probiotics, prebiotics and synbiotics in animal nutrition vol.10, pp.1, 2018,
  29. Use of a direct-fed microbial product as a supplement during the transition period in dairy cattle vol.97, pp.11, 2014,