1887

Abstract

The transmissible agent of scrapie has not yet been characterized but it is commonly referred to as a virus (Andrewes & Pereira, 1967). However, on the basis of its resistance to acetylethyleneimine, Stamp . (1959) suggested that the agent might not contain nucleoprotein. Pattison (1965), reporting on the effect of formalin, expressed the opinion that the agent might not be a virus and now believes it to be, or to be associated with, a small basic protein (Pattison & Jones, 1967). In a study of the effect of ionizing and ultraviolet irradiation Alper, Haig & Clarke (1966) and Alper . (1967) suggested that the agent may lack nucleic acid. On the basis of these results and the inactivation of the scrapie agent with urea and phenol, Gibbons & Hunter (1967) have proposed a membrane hypothesis for its nature. Other workers (e.g. Adams & Caspary, 1967) still believe that the agent is essentially viral in character.

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1968-09-01
2022-01-19
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