SURVIVAL OF SOME MICROORGANISMS IN THE PRESENCE OF ONION ( ALLIUM CEPA  L.) EXTRACTS  IN VITRO

By using disc diffusion assay, the antibacterial and anticandidal activities of extracts prepared from two varieties of onion (red and white) with water and different solvent extracts (ethyl alcohol, methyl alcohol, acetone and diethyl ether) at different concentrations (800, 400, 200 and 100 mg/mL) were evaluated against six bacteria: Enterobacter aerogenes (ATCC 13048), Escherichia coli (ATCC 25922), Salmonella enteritidis (ATCC 13076), Salmonella typhimurium (ATCC 14028), Staphylococcus aureus ssp. aureus (ATCC 29213), Bacillus subtilis (test microorganism of sterilization) and one genus of yeast Candida albicans (ATCC 10231). The research clearly indicates that white Allium cepa (diethyl ether, water and methyl alcohol) and red Allium cepa (diethyl ether, methyl alcohol, water and acetone) extracts were inhibitory against the tested microorganisms. White Allium cepa extract of ethyl alcohol at 800 mg/mL dose was found to be able to inhibit Candida albicans and other extracts were definitely non-inhibitory (p<0.01).

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.