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  • Title: Experimental mixed infection with two tick-borne viruses and interferon-mediated interference.
    Author: Libíková H, Rajcáni J.
    Journal: Acta Virol; 1975 Jan; 19(1):1-9. PubMed ID: 235191.
    Abstract:
    Tick-borne encephalitis virus (TEV), a Flavivirus, and Lipovník virus (LV), a member of the Kemerovo group and complex and possible member of the Rioviridae, were used to infect chick embryo cell (CEC) cultures. LV reproduction was inhibited by preinfection with TEV, mainly in aged cultures. In young CEC cultures, TEV production was stimulated slightly and interferon was sometimes depressed by this superinfection; on the contrary, in aged cultures the superinfecting LV stimulated interferon also when infective LV was not produced because of interference. Double staining by the fluorescent antibody (FA) technique localized both viral antigens often in the same cells. Interference between TEV and LV (and vice versa) was observed in cerebrally infected adult mice. The pathogenicity of LV, when injected first, was increased by TEV superinfection. Examination by the FA technique confirmed interference between TEV and LV also in suckling mouse brains and demonstrated both viral antigens in the same brains when TEV and LV were injected simultaneously.
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