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Investigation of the effect of cellular and viral nucleic acids on certain virus infections. Note 2. Effect of nucleic acids on virus multiplication in cell cultures.

Treatment of cell cultures with different natural nucleic acids prior to inoculation of herpes simplex virus type 1 led in certain cases to an obvious reduction in infectant titer. The reduction was maximum at a dose of 50 micrograms nucleic acid/culture tube and it was not dependent on the nature of the nucleic acid preparation. The antiviral effect of nucleic acids was enhanced by complexation with intercalation agents such as ethidium bromide or violamycin BI. No detectable amounts of interferon could be made evident in cell cultures treated with chromosomal DNA under conditions leading to a reduction by 1.75 log in infectant titer.