Abstract
Summary
1. The inhibitory effect of the sulfated agar polysaccharide on strains of influenza A2 and B viruses was investigated. Complexing of the inhibitor from agar through the use of DEAE-dextran resulted in an improvement in plaque development as well as an increase in number of plaques formed. An optimum DEAE-dextran concentration of 1.0 mg/ml agar was found. 2. The inhibitor did not inactivate virus and had no effect on the hemagglutinating activity of both viruses, but it did interfere with virus adsorption to MK monolayers.
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