STUDIES REGARDING THE ANTIBACTERIAL ACTIVITY OF SOME EXTRACTS OF NATIVE PTERIDOPHYTES

The antioxidant, antimicrobial, antiviral, antiinflammatory, antitussive, antitumor, anti-HIV and antihelmintic properties of various fern extracts were demonstrated. The aim of this paper was the evaluation of antibacterial activity of extracts obtained from three native fern species: Asplenium scolopendrium, Cystopteris fragilis, Polypodium vulgare. The antibacterial activity was demonstrated against five bacterial strains: Staphylococcus aureus ATCC 25923, Streptococcus sp., Escherichia coli, Enterobacter cloacae and one bacterial strain isolated from soil. The most evident antibacterial effect was demonstrated for Cystopteris fragilis gametophytic extract. The most sensitive bacterial strains at extract's activity were Escherichia coli and the bacterial strain isolated from soil.