title: Study of the antibacterial activity of electro-activated solutions of salts of weak organic acids on Salmonella enterica, Staphylococcus aureus and Listeria monocytogenes.
abstract: This work assessed the antibacterial activity of electro-activated solutions of salts of weak organic acids (potassium acetate, potassium citrate and calcium lactate) on Salmonella enterica, Staphylococcus aureus and Listeria monocytogenes. This activity was compared in terms of minimal inhibitory (bactericidal) concentration to the effect of commercial acetic, citric and lactic acid at equivalent titratable acidity. Staining live/dead BacLight method was used to consider physiological state of bacteria following the evaluation of pathogenic strains during exposure to the tested solutions. The results demonstrated strong inhibitory activity of all electro-activated solutions. After 10 min of exposure to electro-activated potassium acetate, a reduction of ≥6 log CFU/ml of all bacteria was observed. The electro-activated potassium citrate demonstrated the lowest minimal inhibitory concentration. Nevertheless, its inactivation power was significantly higher than that of conjugated citric acid. Although electro-activated calcium lactate was found less effective in comparison with its conjugated acid form, after 10 min of contact with the tested pathogens, it induced a population reduction of 2.23, 2.97 and 5.57 log CFU/ml of S. aureus, L. monocytogenes and S. enterica, respectively.
authors.affiliation: Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec, QC, G1V 0A6, Canada.|Department of Soil Sciences and Agri-Food Engineering, Université Laval, Quebec, QC, G1V 0A6, Canada.
authors.forename: Viacheslav
authors.initials: V
authors.lastname: Liato
authors.affiliation: Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec, QC, G1V 0A6, Canada.|Department of Food Sciences, Université Laval, Quebec, QC, G1V 0A6, Canada.
authors.forename: Steve
authors.initials: S
authors.lastname: Labrie
authors.affiliation: Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec, QC, G1V 0A6, Canada. mohammed.aider@fsaa.ulaval.ca.|Department of Soil Sciences and Agri-Food Engineering, Université Laval, Quebec, QC, G1V 0A6, Canada. mohammed.aider@fsaa.ulaval.ca.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Aïder
mesh_terms: D000143:Acids / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D015169:Colony Count, Microbial; D004563:Electrochemistry; D004566:Electrodes; D005516:Food Microbiology; D006801:Humans; D008089:Listeria monocytogenes / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D008856:Microscopy, Fluorescence; D019779:Salmonella enterica / Q000187:drug effects*; D012492:Salts / Q000494:pharmacology; D013211:Staphylococcus aureus / Q000187:drug effects*; D055672:Static Electricity
chemical_list: D000143:Acids; D000900:Anti-Bacterial Agents; D012492:Salts
keywords: Antimicrobial; Electro-activation; Food safety; Inhibition; Listeria monocytogenes; Salmonella enterica; Salts of organic acids; Staphylococcus aureus