[Method of determining the antimicrobial activity of alcohol extracts of propolis]

It is proposed to determine the antimicrobial activity of propolys alcohol extracts by the method of subsequent dilutions in solid nutrient media. Dilution of the extracts immediately in hot agar eliminated the inhibiting effect of the extragent on the microbial growth. Opalesence appearing in the agar did not prevent estimation of the results in contrast to the method of subsequent dilutions in liquid nutrient media.