The Food and Drug Administration is cautioning pet owners about feeding their animals raw diets, warning that those who do may have a higher risk of getting infected with salmonella and listeria monocytogenes.
In a new study, compared with other types of pet food tested, raw pet food was more likely to be contaminated with disease-causing bacteria, the agency said.
The new warning was issued after a two-year study, in which the FDA's Center for Veterinary Medicine screened more than 1,000 samples of pet food for bacteria that can cause foodborne illnesses.
In the study, the center sampled 196 commercially available raw dog and cat foods. The center bought a variety of raw pet foods online from different manufacturers and had the products shipped directly to six laboratories for analysis, according to the FDA. The raw pet-food products were usually frozen in tubelike packages and made from ground meat or sausage.
Of the samples analyzed, 15 were positive for salmonella and 32 were positive for listeria.
The study "identified a potential health risk for the pets eating the raw food, and for the owners handling the product," said Dr. Renate Reimschuessel, a researcher at the center's Office of Research and one of the study's principal investigators.
The FDA said the best way to prevent infection is to not feed your pet a raw diet; however, the agency is aware that some people prefer this type of food and offers tips to prevent salmonella and listeria:
• Thoroughly wash your hands with soap and water (for at least 20 seconds) after handling raw pet food, and after touching surfaces or objects that have come in contact with the raw food. Potential contaminated surfaces include countertops and the inside of refrigerators and microwave ovens. Potential contaminated objects include kitchen utensils, feeding bowls and cutting boards.