New variant Creutzfeldt-Jakob disease.

New variant Creutzfeldt-Jakob disease is a novel human prion disorder with characteristic clinical and neuropathological features, which results from exposure to the bovine spongiform encephalopathy agent. The probably lengthy incubation period makes it difficult to predict future new variant Creutzfeldt-Jakob disease case numbers; further studies are required to clarify risk factors and the potential for human spread.