TABLE 3.

Flock status at the time of testing and risk status of PrP^Sc-positive^a sheep

Flocks	Pretest flock statusb	No. of PrPSc-positive sheep
		Total	With potential contact risk		With genetic susceptibility
			High	Lower	High	Lower
1 and 2	None	2	0	2	2	0
3-5	Birth	7	1	6	7	0
6-16	Purchase	4	3	1	4	0
Total		13	4	9	13	0

^aSheep with PrP^Sc detected in lymphoid follicles of the third eyelid.

^bNone, no reports of scrapie in the flock; Birth, lambing event by an infected sheep on the premises; Purchase, the only sheep with reported potential contact were purchased from other flocks.