Electron microscopy, plaque assay and preliminary serological characterization of three ectromelia virus strains isolated in Poland in the period 1986–1988

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Abstract
Summary Three strains of viruses have been identified as ectromedia virus (EV) based on their origin, clinical features, morphology, size of virions (140×220nm), replicative ability and specific cytoplasmatic fluorescence. The mean diameter of plaques produced by EV strains was 0.76mm (range 0.5–1.0mm). The neutralizing properties of the tested sera were evaluated by seroneutralization (SN) and hemagglutination inhibition (HAI) tests.