Zoonotic bacteria and parasites found in raw meat-based diets for cats and dogs

Feeding raw meat-based diets (RMBDs) to companion animals has become increasingly popular. Since these diets may be contaminated with bacteria and parasites, they may pose a risk to both animal and human health. The purpose of this study was to test for the presence of zoonotic bacterial and parasitic pathogens in Dutch commercial RMBDs. We analysed 35 commercial frozen RMBDs from eight different brands.Escherichia coliserotype O157:H7 was isolated from eight products (23 per cent) and extended-spectrum beta-lactamases-producingE coliwas found in 28 products (80 per cent).Listeria monocytogeneswas present in 19 products (54 per cent), otherListeriaspecies in 15 products (43 per cent) andSalmonellaspecies in seven products (20 per cent). Concerning parasites, four products (11 per cent) contained Sarcocystis cruziand another four (11 per cent)S tenellaIn two products (6 per cent)Toxoplasma gondiiwas found. The results of this study demonstrate the presence of potential zoonotic pathogens in frozen RMBDs that may be a possible source of bacterial infections in pet animals and if transmitted pose a risk for human beings. If non-frozen meat is fed, parasitic infections are also possible. Pet owners should therefore be informed about the risks associated with feeding their animals RMBDs.