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Effects and modes of action of live yeasts in the rumen

Biologia, ISSN: 1336-9563, Vol: 61, Issue: 6, Page: 741-750
2006
  • 93
    Citations
  • 0
    Usage
  • 101
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    93
    • Citation Indexes
      91
    • Policy Citations
      2
      • Policy Citation
        2
  • Captures
    101

Conference Paper Description

Live yeasts (Saccharomyces cerevisiae) are more and more widely used as feed additives for ruminants. They are considered as allochtonous microorganisms in the rumen environment, however, distributed daily to dairy cows or beef cattle they can survive in the digestive tract and interact with autochtonous microbial populations. The positive effects of yeast cells have been mainly demonstrated on growth and activity of fibre-degrading bacteria and fungi, on stabilisation of rumen pH and prevention of lactate accumulation, on ruminai microbial colonization and on the set up of fermentative processes during the pre-weaning period. Modes of action of yeast probiotics depend on their viability and stability in the rumen ecosystem. Up to now, the main modes of action identified are the supply of growth factors to rumen microorganisms, oxygen scavenging inducing more favourable conditions for the anaerobic communities, and nutritional competition with autochtonous ruminai species.

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