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In Vitro Investigation of the Effects of Bacillus subtilis-810B and Bacillus licheniformis-809A on the Rumen Fermentation and Microbiota
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International audience. The effects of two direct fed microbials strains, B. licheniformis 809A and B. subtilis 810B, on rumen fermentation parameters were investigated using various in vitro techniques. B. licheniformis 809A and B. subtilis 810B were able to germinate in rumen content, resist an in-feed monensin commercial dose, favor anaerobiosis, express enzymes, and beneficially impact in vitro rumen microbiota gas production and feed efficiency. These results indicate that B. licheniformis 809A and B. subtilis 810B display good potential for use as direct-fed microbials in ruminant production..