Table 2.

Levels of scrapie prion detected in excreta/secreta

Biological material	Host species	Prion detection method	Equivalent amount of clinical brainstem (g)	Reference
Skin	hamster	western blot	1–2 × 10−4/g	88
Placentaa	sheep	ELISA	2 × 10−2/g	75
Milk	sheep	rodent bioassay	6 × 10−6/ml	55
Feces	sheep	sPMCA	4 × 10−9/g	48
Urine	hamster	sPMCA	1–10 × 10−11/ml	38
	hamster	sPMCA	1 × 10−11/ml	106
Saliva	sheep	sPMCA	2 × 10−8/buccal swab	70

^aprion was measured within cotyledons.