1.   Government veterinarians have said they do not know what form of TSE has infected the sheep.

2.   Scientists think it originated in scrapie, a disease that infects sheep.

3.   Scientists think it stems from scrapie, a disease that infects sheep.

4.   A top government adviser said Monday that research into whether sheep have been infected with mad cow disease is urgent.

5.   Laboratory research has shown that sheep could be infected if fed contaminated brain tissue.

6.   Officials said that was true, although researchers have been able to infect sheep with BSE in laboratories.

7.   Officials said sheep have not gotten mad cow disease anywhere in the world, but acknowledged that scientists have been able to infect sheep with the disease in laboratories.

8.   They claimed the science used in determining that the sheep were infected was flawed.