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  • Title: Establishment of hydrogen-utilizing bacteria in the rumen of the newborn lamb.
    Author: Morvan B, Dore J, Rieu-Lesme F, Foucat L, Fonty G, Gouet P.
    Journal: FEMS Microbiol Lett; 1994 Apr 15; 117(3):249-56. PubMed ID: 8200502.
    Abstract:
    The development of hydrogenotrophic bacteria in the rumen of lambs was investigated by culture and labeling experiments. 14CO2 and 13CO2 incorporation by the rumen microflora of a 24-h-old lamb showed that while there was no labeled methane, double-labeled acetate was formed indicating the presence of hydrogen-dependent acetogenesis. In vitro counts from rumen fluid of 20-h-old lambs confirmed an extensive colonization of acetogenic bacteria while methanogens were absent. Methanogens appeared in the rumen of 30-h-old lambs, and as they developed there was a proportional decrease in the numbers of acetogens, indicating a competition for hydrogen between these two groups. Hydrogen-utilizing sulfate-reducing bacteria, which were established by the 3rd day after birth, did not seem to be affected by this competition.
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