Abstract
Five different interferon preparations were compared for their antiviral activity against Herpes simplex virus type 1 (HSV-1) and several RNA viruses. The interferons used were: interferon α from human buffy coats, interferon β from human fibroblasts, interferon γ from human lymphocytes after stimulation with phytohemagglutinin (PHA), lymphoblastoid interferon from Namalva cells IFN-α (Ly) and cloned α2 interferon produced by Escherichia coli containing the human gene for interferon α2. All preparations were able to protect monolayers of HeLa cells against HSV-1 infection when low multiplicities were used. The five IFN preparations were also tested against encephalomyocarditis (EMC) virus, poliovirus and vesicular stomatitis virus (VSV).
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