Which agency regulates livestock health standards in the United States?

The United States Department of Agriculture (USDA) is responsible for regulating livestock health standards in the United States. The USDA plays a crucial role in maintaining animal health and welfare, ensuring food safety, and promoting agricultural productivity. Its Animal and Plant Health Inspection Service (APHIS) division specifically oversees the import and export of animals, protects livestock from diseases, and implements health regulations that affect their welfare.

The other agencies mentioned have distinct focuses that do not encompass the direct regulation of livestock health. The FDA primarily oversees food safety, pharmaceuticals, and medical devices, which includes some aspects of animal care but is not the main regulatory body for livestock. The Environmental Protection Agency focuses on environmental management and protection, and while it may have indirect influence over agriculture practices, it does not regulate livestock health standards. The CDC is involved in public health and disease control but tends to focus on human health issues rather than the health standards of livestock. Thus, the USDA is the correct agency when it comes to livestock health regulation in the United States.