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Evidence for Normal Cell-Mediated Immunity in Scrapie-Infected Mice

Comparisons between mixed lymphocyte cultures of splenocytes from scrapie-infected and normal mouse brain-inoculated control mice did not reveal any evidence of an impaired cell-mediated immune response in scrapie-infected mice. Likewise, mixed lymphocyte cultures of splenocytes from scrapie-infected and normal mice demonstrated that infected spleen cells had no scrapie-specific antigens on their surfaces. These data suggested that the absence of a detectable scrapie-specific immune response in infected mice was the result of an absence of an exposed scrapie-specific antigen and not due to any direct effect on the immune system.