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Experimental encephalitis in monkeys caused by the Powassan virus

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Abstract

We have carried out a comparative study of the experimental infection of monkeys with the P-40 strain of the Powassen virus, isolated in the Primor'e Territory of the USSR, and with the Canadian prototype LB strain. The Powassan virus was found to be pathogenic forMacaca rhesus. The clinical and pathomorphological picture of the experimental encephalitis was studied, and the full identity of the infection produced in the monkeys by the P-40 strain and the Canadian LB strain of the Powassan virus was demonstrated. On electron microscopic examination of the central nervous system the virus was detected in the neuronss glial cells, and intercellular spaces. The virions of the strains studied have identical morphological parameters, being 37–45 nm in diameter and of spherical shape. The data obtained indicate a marked neurotropism of the virus. They will contribute to the elucidation of the role of the virus in the infection pathology of humans, i.e., in the differentiation of encephalitis cases not associated etiologically with the virus of the spring-summer tickborne encephalitis.

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Authors and Affiliations

  1. Institute of Poliomyelitis and Viral Encephalitis, Academy of Medical Sciences of the USSR, Moscow

    M. P. Frolova, L. M. Isachkova, N. M. Shestopalova & V. V. Pogodina

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  1. M. P. Frolova
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  2. L. M. Isachkova
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  3. N. M. Shestopalova
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  4. V. V. Pogodina
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Translated from Zhurnal Nevropatologii i Psikhiatrii imeni S. S. Korsakova, Vol. 81, No. 2, pp. 25–33, February, 1981.

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Frolova, M.P., Isachkova, L.M., Shestopalova, N.M. et al. Experimental encephalitis in monkeys caused by the Powassan virus. Neurosci Behav Physiol 15, 62–69 (1985). https://doi.org/10.1007/BF01186452

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  • DOI: https://doi.org/10.1007/BF01186452

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