van Staden J J, van der Made H N, Jordaan E
Onderstepoort J Vet Res. 1980 Jun;47(2):77-82.
The effect of the addition of 2, 3, 5, 7 and 10% respectively of propionic acid on known numbers of bacteria added to or contained in carcass meal was examined. Escherichia coli was totally inhibited by 2% propionic acid, while 5% of the acid both inhibited Salmonella typhimurium and brought about a 74,7% reduction in the total aerobic bacterial count.