Table 1.

Number of blood samples collected from non-pregnant and pregnant ewes on 40 farms in the three scrapie categories in scrapie-afflicted areas (see also text).

Category	No of farms	No of samples from non-pregnant ewes	No of samples from pregnant ewes	Total no of samples
Scrapie-free farms	14	94	113	207
Scrapie-prone farms	12	120	119	239
Scrapie-afflicted farms	14	83	106	189
Total numbers*	40	297	338	635

*: Total number of farms, total number of samples from non-pregnant and pregnant ewes, respectively, and grand total of samples.