1.   In many areas of Britain, the highly contagious foot-and-mouth disease has ravaged herds of cattle and flocks of sheep.

2.   Mad cow disease has ravaged cattle herds in Britain but has never been detected in the United States.

3.   It has ravaged herds in Europe and is linked to the fatal human variant Creutzfeldt-Jakob disease.

4.   It has ravaged herds in Europe.

5.   Mad cow disease, or bovine spongiform encephalopathy, has ravaged herds in Europe and is linked to the fatal human variant Creutzfeldt-Jakob disease.

6.   The brain-wasting bovine disease, or BSE, has ravaged herds in Europe and is linked to the fatal human variant Creutzfeldt-Jakob disease.