Some rumen bacteria from New Zealand cattle

Characteristics of saponin-utilizing bacteria from the rumen of cattle.

Evidence for the microbial degradation of plant saponins is limited to few investigations. Rothrock et al. (1955) have reported that the saponins from Dioscorea tubers can be cleaved into their component parts, diosgenin and the sugar moiety, by Aspergillus terreus. Among the bacteria, yeast, and molds examined, only strains of Penicillium, Aspergillus, and Fusarium were capable of hydrolyzing ...

Ammonia-hyperproducing bacteria from New Zealand ruminants.

Pasture-grazed dairy cows, deer, and sheep were tested for the presence of ammonia-hyperproducing (HAP) bacteria in roll tubes containing a medium in which tryptone and Casamino Acids were the sole nitrogen and energy sources. Colonies able to grow on this medium represented 5.2, 1.3, and 11.6% of the total bacterial counts of dairy cows, deer, and sheep, respectively. A total of 14 morphologic...

The pentosanases of some rumen bacteria.

Slime from the Rumen of Cattle

Previous work has shown the percentage of encapsulated bacteria increased when cattle were placed on a feed-lot bloat type diet (Jacobson et al., 1957) and a recent investigation has shown Streptococcus bovis and Peptostreptococcus elsdenii increases in numbers as the onset of bloat symptoms occurred in cases of feed-lot bloat (Gutierrez et al., 1959). Slime produced by ruminal microorganisms i...

The Cellulolytic Activity of Pure Strains of Bacteria from the Rumen of Cattle.

The in vitro breakdown of degraded and undegraded varieties of cellulose was examined by using pure strains of bacteria isolated from the rumen of cattle. One strain of Bacteroides succinogenes, two strains of Ruminococcus albus and two strains of Ruminococcus jlavefaciens were allowed to ferment ground cellulose powder (prepared from filter paper), cellulose powder (Whatman) and undegraded cot...