Agathobacter rectalis
Agathobacter rectalis is a gram-positive, butyrate-producing, anaerobic, rod-shaped and non-spore-forming bacterium from the genus of Agathobacter with a single flagellate which occur in the rumen content of sheep and cows.
It is suggested that Eubacterium rectale is a synonym of A. rectalis, but this is not universally accepted.
Reduced numbers of Agathobacter rectalis in the gut may be a risk factor for Alzheimer's disease.