U.S. Food and Drug Administration

Bovine Spongiform Encephalopathy (BSE)

Also Known as 'Mad Cow Disease'

Industry/Veterinary Information

Blood Safety

Bovine-Based Vaccines


Harvard BSE Risk Assessment Study (updated 2003)

A landmark study shows the risk of BSE occurring in the U.S. to be extremely low.
Full Report

General Background

Consumer Information


What Is BSE?

Bovine spongiform encephalopathy (BSE) is a chronic, degenerative disorder affecting the central nervous system of cattle. BSE Fact Sheet


Recent Actions

FDA Joins Investigation of Latest BSE Case (March 13, 2006)

FDA Proposes Additional ''Mad Cow'' Safeguards (Oct. 4, 2005)

Federal Register Proposed Rule: Substances Prohibited From Use in Animal Food or Feed (Oct. 6, 2005)
Text  PDF (247 KB)

Certain Cattle Material Allowed in Foods, Cosmetics (Sept. 6, 2005) (Federal Register)


BSE Archive Page