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Abstract
There is good evidence that the bacterial and fungal probiotics are effective in the manipulation of rumen development and function. The effects of adherent Streptococcus bovis preparations were manifested by significant increase of adherent S. bovis bacteria and alpha amylase activity in the rumen wall of young ruminants. Fungal probiotics based on Sacharomyces cerevisiae and Aspergillus oryzae are rapidly gaining acceptance as a means of improving productivity in adult ruminants. However, fungal probiotics may also have a complementary role to bacterial probiotics in young animals. Dietary yeast improved performance of calves and lambs in terms of feed intake and live weight gain and Aspergillus foetidus was effective in altering rumen fermentation in newly weaned lambs.
