ANTIBACTERIAL ACTIVITY OF DIFFERENT FRACTIONS FROM THE CULTURE OF  PROPIONIBACTERIUM ACIDIPROPIONICI

The effect of medium and time of culturing of Propionibacterium acidipropionici was studied on the biosynthesis of metabolites of antibacterial activity against selected gram-negative Enterobacteriaceae rods and Staphylococcus aureus. The strain was found to synthesise antibacterial metabolites others than volatile acids exclusively when cultured in natural media, i.e. milk and whey of pH being adjusted every 24 h to 6.8 at optimal temperature. The antibacterial activity of neutralised cultures was observed after 5 days of incubation. Heating of the culture at 55⁰C for 5 min caused that the antibacterial activity disappeared. Fractionation of the culture by separating the biomass by centrifugation and filtering the supernatant through bacteriological filter showed that biomass suspended in distilled water had strong antibacterial activity, whereas cell-free filtrate did not inhibit the growth of indicator strains.

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ANTIBIOTIC RESISTANCE OF BACTERIA OF THE FAMILY ENTEROBACTERIACEA ISOLATED FROM VEGETABLES – SHORT REPORT

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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.