1.   Mad cow disease started when parts of infected sheep were ground up and mixed with cattle feed.

2.   ...an infection popularly called mad cow disease.

3.   Five kudus in the London Zoo have caught BSE or mad cow disease.

4.   News that Switzerland is facing an epidemic of bovine spongiform encephalopathy or mad cow disease have revived fears of a spread of the disease throughout Europe.

5.   They all study Building Services Engineering, known as BSE, which are also the initials for mad cow disease.

6.   Although mad cow disease is not a threat to the U.S. cattle industry, there are other concerns.

7.   Although the Agriculture Department tries to test downer cows for signs of mad cow disease, it can only sample a small percentage.

8.   Among other things, drug-producing animals will have to be certified as free of mad cow disease or other serious infectious illnesses.

9.   Although the consensus holds that an arrival in America is unlikely soon, scientists insist that keeping mad cow disease at bay demands vigilance.

10.   Among the issues are the traceability of cattle, increased testing for mad cow disease and meat labeling.