Acetic acid is used usually as vinegar (5 to 10% acetic acid) or as salts of sodiumand calcium at 25% or higher levels in pickles, salad dressings, and sauces. It ismore effective against bacteria than yeasts and molds. Bacteria that grow better above pH 6.0 are more inhibited. The inhibitory concentrations of undissociated acid are 0.02% against Salmonella spp., 0.01% against Staphlococcus aureus, 0.02%against Bacillus cereus, 0.1% against Aspergillus spp., and 0.5% against Saccharo-myces spp. The inhibitory action of acetic acid is produced through neutralizing theelectrochemical gradient of the cell membrane as well as denaturing proteins insidethe cells. Besides its use in food, acetic acid has been recommended for use (1 to2%) in carcass wash to reduce bacterial levels