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  • Title: Persistence of tick-borne encephalitis virus in monkeys. I. Features of experimental infection.
    Author: Pogodina VV, Frolova MP, Malenko GV, Fokina GI, Levina LS, Mamonenko LL, Koreshkova GV, Ralf NM.
    Journal: Acta Virol; 1981 Nov; 25(6):337-43. PubMed ID: 6120634.
    Abstract:
    Sixty-seven Macaca rhesus monkeys were inoculated with 2 mutants and 3 virulent strains of tick-borne encephalitis (TBE) virus including strains isolated from patients with a chronic form of TBE. A model of the clinical course of acute, subacute, and chronic encephalitis was produced by intracerebral inoculation and that of asymptomatic infection was produced by subcutaneous inoculation [with or without administration of cyclophosphane (CP)]. Virus persistence developed after inoculation with all the strains, after non-fatal encephalitis and inapparent infection irrespective of CP administration. In monkeys recovering from encephalitis the virus persisted for at least 783 days. After asymptomatic infection, it persisted for 302 days; neither virus nor virus-specific antigen was detected at 356, 367, and 620 days.
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