title: Antimicrobial activity of olive oil, vinegar, and various beverages against foodborne pathogens.
abstract: The survival of foodborne pathogens in aqueous extracts of olive oil, virgin olive oil, vinegar, and several beverages was evaluated. Vinegar and aqueous extracts of virgin olive oil showed the strongest bactericidal activity against all strains tested. Red and white wines also killed most strains after 5 min of contact, black and green tea extracts showed weak antimicrobial activity under these conditions, and no effect was observed for the remaining beverages (fruit juices, Coca-Cola, dairy products, coffee, and beer). The phenolic compound content of the aqueous olive oil and virgin olive oil extracts could explain their antibacterial activity, which was also confirmed in mayonnaises and salads used as food models. Virgin olive oil in mayonnaises and salads reduced the counts of inoculated Salmonella Enteritidis and Listeria monocytogenes by approximately 3 log CFU/g. Therefore, olive oil could be a hurdle component in certain processed foods and exert a protective effect against foodborne pathogens when contaminated foods are ingested.
authors.affiliation: Food Biotechnology Department, Instituto de la Grasa, Avda. Padre García Tejero 4, 41012-Seville, Spain.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Medina
authors.forename: Concepción
authors.initials: C
authors.lastname: Romero
authors.forename: Manuel
authors.initials: M
authors.lastname: Brenes
authors.forename: Antonio
authors.initials: A
authors.lastname: De Castro
mesh_terms: D019342:Acetic Acid / Q000737:chemistry / Q000494:pharmacology*; D001628:Beverages / Q000382:microbiology*; D015169:Colony Count, Microbial; D003257:Consumer Product Safety; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D005506:Food Contamination / Q000517:prevention & control; D005519:Food Preservation / Q000379:methods*; D005520:Food Preservatives / Q000494:pharmacology*; D006801:Humans; D008089:Listeria monocytogenes / Q000187:drug effects / Q000254:growth & development; D000069463:Olive Oil; D010636:Phenols / Q000494:pharmacology; D010938:Plant Oils / Q000737:chemistry / Q000494:pharmacology*; D012477:Salmonella enteritidis / Q000187:drug effects / Q000254:growth & development
chemical_list: D005520:Food Preservatives; D000069463:Olive Oil; D010636:Phenols; D010938:Plant Oils; D019342:Acetic Acid