How to escape 'the eskape pathogens' using plant extracts

Oleksandra Pallah, Tamara Meleshko, Tamara Meleshko, Svitlana Tymoshchuk, Svitlana Tymoshchuk, Lesya Yusko, Lesya Yusko, Larisa Bugyna, Larisa Bugyna


The aim of the work was to determine the content of biologically active substances, namely polyphenols and anthocyanins, in the extracts of cherryplum, blueberries, jostaberry, sweet cherries, plums, red and black currants, and to study the effect of these extracts on the growth and biofilm formation of clinical isolates of ESKAPE Pathogens in vitro.

Materials and methods. The antibiotic resistance of the following clinical isolates: Enterococcus faecalis, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter cloacae was determined by the Kirby-Bauer diffusion method. The bioactive substances content was determined with a thin layer chromatography method. The effect of berry extracts on the above-mentioned isolates was studied by the method of compatible cultivation. The capacity of clinical isolates to form a biofilm was studied by a spectrophotometric method, using gentian violet.

Results. Having analyzed the results of the antibiotic sensitivity of clinical isolates, it was found, that they were resistant to all antimicrobials used. The analysis of the content of bioactive substances of berry extracts showed that they contain a large amount of anthocyanins and polyphenols. It was revealed, that clinical isolates are capable of forming biofilms, and the selected berry extracts had the ability to inhibit the formed biofilms with isolates of clinical origin, such as Klebsiella pneumoniae and Pseudomonas aeruginosa.

Conclusions. Researching the antibacterial properties of anthocyanins and polyphenols, extracted from berries, we can conclude, that they are capable of inhibiting the growth of not only planktonic strains forms, selected by us, but also inhibit the biofilms, formed by them


isolates of clinical origin; biofilms; plant extracts

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