[Isolation of a nonclassical virus and a study of its etiological role in human amyotrophic leukospongiosis].

The study of the brain of a patients with amyotrophic leukospongiosis and the brain of squirrel monkeys with the experimentally induced disease has resulted in the isolation of an agent which, in accordance with its physicochemical and biological properties, can be classified with unconventional viruses. The results of the experimental reproduction of the disease in laboratory animals have confirmed its etiological role in the development of the disease.