Characterization of rat cecum cellulolytic bacteria

Cellulolytic and non-cellulolytic bacteria in rat gastrointestinal tracts.

Lactobacillus and Bifidobacterium species were the predominant organisms isolated from small intestinal (jejunal) contents of rats, and lactic acid was the only organic acid detected. The numbers of cellulolytic bacteria in small intestines were low (approximately 10(3)/g). The fermentation in ceca was different from that in intestines, as, in addition to small amounts of lactic acid, high conc...

Isolation of Cellulolytic Bacteria

Competition among three predominant ruminal cellulolytic bacteria in the absence or presence of non-cellulolytic bacteria.

Competition among three species of ruminal cellulolytic bacteria - Fibrobacter succinogenes S85, Ruminococcus flavefaciens FD-1 and Ruminococcus albus 7 - was studied in the presence or absence of the non-cellulolytic ruminal bacteria Selenomonas ruminantium or Streptococcus bovis. Co-cultures were grown under either batch or continuous conditions and populations were estimated using species-sp...

Unravelling carbon metabolism in anaerobic cellulolytic bacteria.

Carbon metabolism in anaerobic cellulolytic bacteria has been investigated essentially in Clostridium thermocellum, Clostridium cellulolyticum, Fibrobacter succinogenes, Ruminococcus flavefaciens, and Ruminococcus albus. While cellulose depolymerization into soluble sugars by various cellulases is undoubtedly the first step in bacterial metabolisation of cellulose, it is not the only one to con...

Studies on the Nitrogen Requirements of Some Ruminal Cellulolytic Bacteria.

Knowledge of the nitrogen compounds utilized for growth of ruminal cellulolytic bacteria is of considerable importance to an understanding of the nitrogen economy of ruminants and of factors affecting ruminal cellulose digestion. Work with mixed cultures of bacteria from the rumen has shown that cellulose digestion occurs with ammonia or urea, which rapidly yields ammonia, as the sole source of...