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1887

Abstract

SUMMARY Ten isolates belonging to the genus and two each of and an unidentified sp. were isolated from high dilutions of rumen fluid from sheep conditioned to low-protein teff hay. The butyrivibrios solubilized between io and 37 % of the -cellulose of the hay (average 21 %). The two isolates of degraded 43 and 56 % of the -cellulose and the two of 39 and 66 %, while the two Clostridium cultures achieved only 10 % degradation. Hemicellulose degradation by the Butyrivibrio isolates was between 25 and 67 % (mean 48 %) and that by the four Ruminococcus cultures between 47 and 65 %. One of the Clostridium cultures solubilized 21 % and the other 51 % of die hemicellulose. The butyrivibrios appear capable of contributing a greater share towards cellulose digestion in ruminants on low-protein hay than has been inferred from qualitative tests for cellulolysis, using refined cellulose preparations; they are probably less active than the ruminococci.

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/content/journal/micro/10.1099/00221287-55-3-459
1969-03-01
2025-04-27
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