TABLE 2.

Classification of animals studied

Groupa	Animal tag no.	Histology finding	Culture result	Flock JD status
Noninfected controls	5060	0	−	−
	5061	0	−	−
	5066	0	−	−
	5067	0	−	−
AS	7048	0	+	+
	7032	0	+	+
	7068	0	+	+
	7089	0	+	+
PB	0520	6PB	+	+
	5	9PB	+	+
	0527	11PB	+	+
	7067	12PB	+	+
	0783	12PB	+	+
	0987	13PB	+	+
MB	7091	5MB	+	+
	7	10MB	+	+
	6	13MB	+	+
	0902	13MB	+	+
	0831	13MB	+	+
	0622	13MB	+	+
	0985	13MB	+	+

^aSheep from farms with ongoing ovine JD were sorted according to histology and culture results into groups representing a noninfected control group, an infected nondiseased asymptomatic group (AS), a PB group, and an MB group.