The Journal "Agriculture and Forestry"
Časopis "Poljoprivreda i šumarstvo"
- Since 1955 -
Volume 69, Issue 4 (15.12.2023)
| Volume : | 69 |
| Issue : | 4 (15.12.2023) |
| Authors : | Velichka YANAKIEVA, Albena PARZHANOVA,Dimitar DIMITROV, Ivelina VASILEVA,Petya RAEVA, Snezhana IVANOVA |
| Title : | STUDY ON THE ANTIMICROBIAL ACTIVITY OF MEDICINAL PLANT EXTRACTS AND EMULSION PRODUCTS WITH INTEGRATED HERBAL EXTRACTS |
| Abstract : | The antimicrobial activity of water and oil extracts of five identified medicinal plants – thyme (Thymus callieri Borbás ex Velen), St. John's wort (Hypericum perforatum L.), cirsium (Cirsium ligulare Bois), hawthorn – flowers with leaf (Crataegus monogyna Jacq.), hawthorn–berries (Crataegus monogyna Jacq.) and juniper (Juniperus communis L) was investigated. The antimicrobial activity of the water extracts was tested against two groups of microorganisms: pathogenic (Escherichia coli ATCC 8739, Salmonella enteretidis ATCC 13076, Klebsiella sp. (clinical isolate), Staphylococcus aureus ATCC 25923, Candida albicans NBIMCC 74 and Listeria monocytogenes ATCC 8632) and saprophytic (Bacillus cereus ATCC 11778, Bacillus subtilis ATCC 6633, Saccharomyces cerevisiae ATCC 9763, Penicillium sp., Rhizopus sp., Aspergillus niger ATCC 1015, Aspergillus flavus, Fusarium moniliforme ATCC 38932). The obtained water extracts from all plant sources suppressed the growth of S. aureus ATCC 25923 and L. monocytogenes ATCC 8632, as well as the fungi A. niger ATCC 1015, A. flavus, Penicillium sp., Rhizopus sp., F. moniliforme ATCC 38932. The oil extracts showed inhibitory effect only on S. aureus ATCC 25923. In order to investigate their food biopreservation effect, the obtained plant extracts were incorporated in food matrix – mayonnaise, and stored for 20 days. During the storage, samples for microbiological analyses were taken. It was found that until the 12th day of the storage, in the controls as well as in the three samples of mayonnaise and the three samples of mayonnaise sauce, the yeasts and fungal counts were below the permissible values, while on the 20th day of the storage, visible fungal growth in all samples was observed. |
| For citation : | Yanakieva, V., Parzhanova, A., Dimitrov, D., Vasileva, I., Raeva, P., Ivanova, S. (2023): Study on the antimicrobial activity of medicinal plant extracts and emulsion products with integrated herbal extracts. Agriculture and Forestry, 69 (4): 71-89. doi:10.17707/AgricultForest.69.4.06 |
| Keywords : | antimicrobial activity, pathogenic and saprophytic microorganisms, medicinal plants, mayonnaise, mayonnaise sauce |
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