Showing the mean scores of selected observations in the ileal PP follicles according to the time of incubation and nature of inoculum.

A number of different morphological observations were found to change over time. Measurements were made of intercellular spaces between cells and of the intercellular content (granular material, vesicles and electron dense material) from intestinal loops challenged with infected (scrapie brain infected material inoculum) or control (normal brain or sucrose inoculum) material. The values are stated as mean values created by subjective assessments where 3 = large/abundant, 2 = moderate, 1 = narrow/sparse, and 0 = absent.