Metabolism and some characteristics of ruminal strains of Megasphaera elsdenii
Language English Country United States Media print
Document type Journal Article
PubMed
2764566
PubMed Central
PMC202906
DOI
10.1128/aem.55.6.1570-1573.1989
Knihovny.cz E-resources
- MeSH
- Drug Resistance, Microbial MeSH
- Rumen microbiology MeSH
- Fermentation MeSH
- Glucose metabolism MeSH
- Lactic Acid MeSH
- Lactates metabolism MeSH
- Carbohydrate Metabolism MeSH
- Peptostreptococcus drug effects isolation & purification metabolism MeSH
- Cattle MeSH
- Animals MeSH
- Check Tag
- Cattle MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Glucose MeSH
- Lactic Acid MeSH
- Lactates MeSH
Megasphaera elsdenii belongs to the group comprising the ruminal and intestinal lactate- and sugar-fermenting species. In the present study the fermentation characteristics, metabolism of glucose and lactate, and susceptibility to antimicrobial agents of four ruminal strains were investigated. Particular attention was given to the mixed-substrate fermentation pattern and resultant fermentation acid profile. Lactate was utilized more rapidly than glucose in media with both carbon sources. Interaction of the two substrates changed the composition of fermentation end products toward more valerate and less propionate in cultures with glucose and lactate. Contrary to the indications in Bergey's Manual of Systematic Bacteriology, butyrate, not caproate, was the main end product of glucose metabolism. The strains examined were rather insensitive to many antimicrobial compounds, especially to ionophores and other antimicrobial feed additives.
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