Lysine degradation by ruminal Fusobacterium necrophorum

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dc.contributor.author Elwakeel, E.A.
dc.contributor.author Amachawadi, R.G.
dc.contributor.author Nour, A.M.
dc.contributor.author Nassar, M.E.
dc.contributor.author Nagaraja, T. G.
dc.contributor.author Titgemeyer, Evan C.
dc.date.accessioned 2012-09-07T15:43:41Z
dc.date.available 2012-09-07T15:43:41Z
dc.date.issued 2012-09-07
dc.identifier.uri http://hdl.handle.net/2097/14655
dc.description Dairy Research, 2010 is known as Dairy Day, 2010 en_US
dc.description.abstract Three experiments were conducted to characterize lysine fermentation by Fusobacterium necrophorum, a ruminal bacterium that is known to degrade amino acids. In Experiment 1, 7 strains of Fusobacterium necrophorum were inoculated into media containing lysine (50 mM), lactate (50 mM), or lysine plus lactate (50 mM each) as the major energy substrate to evaluate growth and ammonia production. All strains grew with lysine, lactate, or lactate plus lysine as the primary substrate. When grown with lysine, all strains produced ammonia as an end product, even if lactate was also present. Smaller concentrations of ammonia for medium containing lactate plus lysine when compared with lysine alone indicate that the Fusobacterium strains used lactate as a growth substrate that stimulated utilization of ammonia. In Experiment 2, the 2 strains tested were able to degrade extensively both lysine and glutamic acid. Some evidence was detected for partial utilization for growth of histidine, methionine, and tryptophan by strain A21. In Experiment 3, the minimum inhibitory concentration (MIC) of the antibiotic tylosin was 25 μg/mL when Fusobacterium necrophorum strains A21 and B35 were grown in either lysine or lactate-enriched medium. The MIC of monensin was 6.25 and 3.9 μg/mL for strains A21 and B35, respectively, when grown in lysine-enriched medium, but > 50 and 10.9 μg/mL when the strains were grown in lactate-enriched medium. These findings may lead to ways that ruminal lysine degradation may be controlled. en_US
dc.publisher Kansas Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Dairy Day, 2010 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 11-129-S en_US
dc.relation.isPartOf Report of progress (Kansas Agricultural Experiment Station and Cooperative Extension Service); 1039 en_US
dc.subject Dairy en_US
dc.subject Bacterial digestion en_US
dc.subject Lactate en_US
dc.subject Lysine degradation en_US
dc.title Lysine degradation by ruminal Fusobacterium necrophorum en_US
dc.type Conference paper en_US
dc.date.published 2010 en_US
dc.citation.epage 15 en_US
dc.citation.spage 12 en_US
dc.contributor.authoreid tnagaraj en_US
dc.contributor.authoreid etitgeme en_US

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