Propionibacterium /prō′pē·on′ēbaktir′ē·əm/ [Gk, pro + pion, fat, bakterion, small rod] , a genus of nonmotile, anaerobic, gram-positive bacteria found on the skin of humans, in the intestinal tract of humans and animals, and in dairy products. Propionibacterium acnes is common in acne pustules. Formerly called Corynebacterium acnes.
