These organisms are abundant in mesophilic AD systems although nothing is known about their ecology. The two clinical isolates of the genus are aerotolerant (6% O_2) anaerobes with a coccus morphology. They do not ferment sugars but small amounts of acetate and butyrate are produced when grown on Fastidious Anaerobe Broth with meat granules. Nitrate is not reduced 1.
 Falsen, Collins, Welinder-Olsson, Song, Finegold, Lawson, et al. (2005): Fastidiosipila sanguinis gen. nov., sp. nov., a new Gram-positive, coccus-shaped organism from human blood. Int. J. Syst. Evol. Microbiol. 55(Pt 2): 853-8. doi:10.1099/ijs.0.63327-0