Abstract
We investigated the susceptibilities of Syrian golden hamsters to transmissible spongiform encephalopathy agents from cattle. We report efficient transmission of the L-type atypical bovine spongiform encephalopathy (BSE) agent into hamsters. Importantly, hamsters were also susceptible to the transmissible mink encephalopathy agent from cattle, which has molecular features similar to those of the L-type BSE agent, as also shown in bovinized transgenic mice. In sharp contrast, hamsters could not be infected with classical or H-type BSE agents from cattle. However, previous adaptation of the classical BSE agent in wild-type mice led to efficient transmission. Thus, this study demonstrates the existence of distinct "strain barriers" upon the transmission of bovine prions in hamsters.
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