We investigated 10 samples of propolis, which were collected in different regions of Lithuania and Czechia. The highest concentrations of phenolic compounds (1.64–1.53 g/100 ml) were found in samples of PEE collected from hives located near deciduous and mixed forests, and the lowest concentrations came from (0.18 g/100 ml) cultivated meadows far from forests. All samples of PEE (1:10) which is most often used in medicina practice killed gram-positive, gram-negative bacteria and fungi. Four Times diluted Czech PEE samples showed antimicrobial activity against all investigated microorganisms, Lithuanian PEE samples inhibited the growth of gram-positive and gram-positive spore-forming bacteria, but the growth of gram-negative bacteria was not affected. These data show that a correlation between the concentrations of phenolic compounds and flavonoids and antimicrobial activity has been neglected.

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2011 - Vol.57
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