Inhibition of Listeria monocytogenes and Salmonella enteriditis by combinations of plant oils and derivatives of benzoic acid: the development of synergistic antimicrobial combinations.
This study describes inhibitory properties of combinations of oil of fennel, oil of anise or oil of basil with either benzoic acid or methyl-paraben against Listeria monocytogenes and Salmonella enteriditis. Micro-organisms were cultured at 37 degrees C in broth and viable counts measured over a 48-h period. S. enteriditis was particularly sensitive to inhibition by a combination of oil of anise, fennel or basil with methyl-paraben where there was < 10 CFU/ml after 1 h. L. monocytogenes was less sensitive to inhibition by each combination however there was a significant reduction in growth of 4-8 log by combinations of all oils and methyl-paraben at 8, 24 and 48 h. Synergistic inhibition by one or more combinations was evident against each micro-organism.
Fyfe
L
L
Department of Dietetics and Nutrition, Queen Margaret College, Edinburgh, UK.
Armstrong
F
F
Stewart
J
J
D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D019661:Apiaceae; D001565:Benzoates / Q000494:pharmacology*; D019817:Benzoic Acid; D004338:Drug Combinations; D004357:Drug Synergism; D005309:Ferula; D005516:Food Microbiology; D005520:Food Preservatives / Q000494:pharmacology; D008089:Listeria monocytogenes / Q000187:drug effects* / Q000254:growth & development; D031339:Ocimum; D010226:Parabens / Q000494:pharmacology*; D010938:Plant Oils / Q000494:pharmacology*; D010946:Plants, Medicinal; D010947:Plants, Toxic; D015203:Reproducibility of Results; D012477:Salmonella enteritidis / Q000187:drug effects* / Q000254:growth & development
D000900:Anti-Bacterial Agents; D001565:Benzoates; D004338:Drug Combinations; D005520:Food Preservatives; D010226:Parabens; D010938:Plant Oils; D019817:Benzoic Acid; C015358:methylparaben; C051168:basil oil