Fibrobacter succinogenes

​At a pH of 6.5, F. succinogenes has a greater presence in the rumen. When pH is lower than 6, cellulolytic ruminal bacteria often cannot exist, resulting in anion toxicity. Image courtesy of the ​UT Beef and Forage Center

​F. succinogenes is specialized only for cellulose, unlike other bacteria that utilize multiple polysaccharide sources. Image courtesy of the UT Beef and Forage Center

F. succinogenes was one of the first cellulolytic bacteria to be cultured in large numbers, leading scientists to discover the bacteria’s importance related to the digestion of cellulose.​ Image courtesy of Dennis Kunkel Microscopy/Science Photo Library

​F. succinogenes has one of the greatest densities in the rumen compared to other cellulolytic bacteria. However, in comparison to the many species of bacteria present in the rumen, it represents about 0.1% of the relative bacterial population. Image courtesy of microBEnet