Bacteriological evaluation of commercial canine and feline raw diets.

Twenty-five commercial raw diets for dogs and cats were evaluated bacteriologically. Coliforms were present in all diets, ranging from 3.5 x 10(3) to 9.4 x 10(6) CFU/g (mean 8.9 x 10(5); standard deviation 1.9 x 10(6)). Escherichia coli was identified in 15/25 (64%) diets; however, E. coli O157 was not detected. Salmonella spp. were detected in 5/25 (20%) diets; 1 each of beef-, lamb-, quail-, chicken-, and ostrich-based diets. Sporeforming bacteria were identified from 4/25 (16%) samples on direct culture and 25/25 (100%) samples using enrichment culture. Clostridium perfringens was identified in 5/25 (20%) samples. A toxigenic strain of C. difficile was isolated from one turkey-based food. Staphylococcus aureus was isolated from 1/25 (4%) diets. Campylobacter spp. were not isolated from any of the diets.