Effect of prion infection on weight gain over the incubation period of disease.

Hamsters were inoculated with either uninfected brain homogenate (blue triangles), DY-infected brain homogenate (orange diamonds), 139H-infected brain homogenate (gray circles) or an equal mixture of 139H and DY-infected brain homogenate (yellow squares) and their weights were recorded weekly. Solid grey triangle and open yellow triangle indicates when the weight of 139H-infected or 139H/DY co-infected hamsters, respectively, significantly (p<0.05) differed from mock-infected animals.