The genus's type species is Sarcina ventriculi, a variety found on the surface of cereal seeds, in soil, mud, and in the stomachs of humans, rabbits, and guinea pigs.

What does Sarcina look like?

Spherical, appearing in cuboidal packets of eight or more. Division occurs in three perpendicular planes. Some cells occur singly, in pairs, or tetrads.

Is Sarcina pathogenic?

Sarcina is a Gram-positive anaerobic coccus that has been consistently reported in the upper gastrointestinal tract biopsies of patients with evidence of gastric stasis. The pathogenic role of Sarcina in humans is not entirely known.