Center for Disease Control and Prevention, HHS and USDA Select Agents and Toxins, Revised February 23, 2006; available at: http://www.cdc.gov/od/sap/docs/salist.pdf.
Adapted from National Research Council, Biotechnology Research in an Age of Terrorism, The National Academies Press, Washington, D.C., 2004; available at http://www.nap.edu/books/0309089778/html.