title: Antimicrobial activity of 10 different plant polyphenols against bacteria causing food-borne disease.
abstract: The antibacterial activities of 10 different plant polyphenols were evaluated by comparing their minimum inhibitory concentrations (MICs) against several food-borne pathogenic bacteria, Staphylococcus aureus (20 strains), some serotypes of the genus Salmonella (26 strains), Escherichia coli (23 strains), and some species of the genus Vibrio (27 strains). The polyphenols examined were epigallocatechin (1), epigallocatechin-3-O-gallate (2), punicalagin (3), tannic acid (4), castalagin (5), prodelphinidin (6), geraniin (7), procyanidins (8), a theaflavin mixture of black tea (9), and green tea polyphenols treated with loquat polyphenol oxidase (10). The average MICs of all polyphenols against S. aureus and the genus Vibrio (192+/-91 and 162+/-165 microg/ml, respectively) were much lower than the values against the genus Salmonella and E. coli (795+/-590 and 1519+/-949 microg/ml, respectively) (p<0.01). The coefficient of variation of the MICs of all polyphenols against S. aureus was the least and that against the genus Vibrio was the greatest. The mean MICs of each plant polyphenol against S. aureus (98-389 microg/ml) and the genus Vibrio (68-488 microg/ml) were similar. The relatively lower mean MIC values of 1, 2, 5, and 6 suggest the importance of 3,4,5-trihydroxyphenyl groups in antibacterial activity.
authors.affiliation: Nagasaki Prefectural Institute of Public Health and Environmental Sciences, Japan. tagurit@pref.nagasaki.lg.jp
authors.forename: Toshitsugu
authors.initials: T
authors.lastname: Taguri
authors.forename: Takashi
authors.initials: T
authors.lastname: Tanaka
authors.forename: Isao
authors.initials: I
authors.lastname: Kouno
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D001424:Bacterial Infections / Q000188:drug therapy / Q000382:microbiology*; D005419:Flavonoids / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D005517:Foodborne Diseases / Q000188:drug therapy / Q000382:microbiology*; D008826:Microbial Sensitivity Tests; D010636:Phenols / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use; D059808:Polyphenols; D012475:Salmonella / Q000187:drug effects / Q000502:physiology; D013211:Staphylococcus aureus / Q000187:drug effects / Q000502:physiology
chemical_list: D000900:Anti-Bacterial Agents; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts; D059808:Polyphenols