Disparate animal groups, such as ruminants and humans, can digest a variety of plant fibers because they harbor cellulase-producing bacteria such as

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Bacteroides and Ruminococcus are both cellulase-producing bacteria that aid in the digestion of plant fibers in ruminants and humans. Staphylococcus aureus and Bacillus subtilis are not typically associated with cellulase production, and Salmonella and Shigella are pathogenic bacteria that do not aid in digestion. Escherichia coli and Enterococcus faecalis may aid in some digestive processes, but they are not known for cellulase production. Escherichia chrysanthemi and Erwinia uredovora are plant pathogenic bacteria and are not associated with digestion.

Disparate Animal Groups, Such as Ruminants and Humans, Can Digest