Which agencies regulate antimicrobial use in animal feed in the United States?

• A. CDC and NIH
• B. FDA and USDA
• C. EPA and FDA
• D. FDA alone

Answer: (B)

Understanding how antimicrobials in animal feed are regulated requires looking at both drug oversight and food-safety enforcement. The FDA handles veterinary medicines and feed additives—this includes approving antimicrobial active ingredients, setting labeling and usage rules, and enforcing requirements like the Veterinary Feed Directive that requires a veterinarian’s oversight for medically important antibiotics used in feed. They also monitor residues in animal-derived foods to protect consumers.

The USDA contributes through its food-safety role, primarily via the meat, poultry, and egg inspection programs. The USDA ensures that animals entering the food system are raised and processed in ways that protect public health, including enforcing residue controls and conducting inspections and testing to prevent contaminated products from reaching consumers.

Other agencies like CDC and NIH don’t regulate antimicrobial use in animal feed, and the EPA focuses on pesticides rather than therapeutic antimicrobials. While FDA is a key regulator, the USDA’s involvement in inspecting and ensuring the safety of meat and other products means both agencies are part of the regulatory landscape.