blautia obeum blautia obeum blautia obeum is a species of anaerobic, gram-positive bacteria found in the gut. blautia obeum scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: blautia species: b. obeum binomial name blautia obeum(moore et al. 1976) lawson and finegold 2015 synonyms ruminococcus obeum it has been shown that b. obeum along with other relevant taxa play an important role both in the recovery process from vibrio cholerae infection and microbiota maturation in children. moreover, experiments in model mice show that b. obeum strain ai-2 reduces the pathogenicity of v. cholerae. the data show that the expression of quorum sensing autoinducers by b. obeum is increased in v. cholera infections and they repress the expression of several v. cholera virulence factors.