The Propionibacteriaceae are a family of Gram-positive bacteria found in dairy products or in the intestinal tracts of animals and living in the pores of humans.[1]
^ abDelwiche EA (1957). "Family XI. Propionobacteriaceae Delwiche, fam. nov.". In Breed RS, Murray EG, Smith NR (eds.). Bergey's Manual of Determinative Bacteriology (7th ed.). Baltimore, MD: The Williams and Wilkins Co. p. 569.