An official website of the United States government.

The .gov means it’s official.
Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar.

This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely.

Slide of treating ear of infested pig

Image (illustration or photograph) for this item, linking to higher res image.

Citation

Animal and Plant Health Inspection Service, United States Department of Agriculture. “Slide of treating ear of infested pig.” Special Collections, USDA National Agricultural Library. Accessed May 2, 2025, https://www.nal.usda.gov/exhibits/speccoll/items/show/7322.