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Titre du document / Document title

Antibacterial activity of coffee extracts and selected coffee chemical compounds against enterobacteria

Auteur(s) / Author(s)

ALMEIDA Ana Amélia P. (1) ; FARAH Adriana (2) ; SILVA Daniela A. M. (1) ; NUNAN Elziria A. (3) ; GLORIA M. Beatriz A. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Departamento de Alimentos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, Belo Horizonte, MG, 31270-901, BRESIL
(2) Laboratório de Bioquímica Nutricional e de Alimentos, Instituto de Química, Universidade Federal do Rio de Janeiro, Ilha do Fundão, RJ, 21949-900, BRESIL
(3) Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, Belo Horizonte, MG, 31270-901, BRESIL

Résumé / Abstract

The in vitro antimicrobial activity of commercial coffee extracts and chemical compounds was investigated on nine strains of enterobacteria. The antimicrobial activity investigated by the disc diffusion method was observed in both the extracts and tested chemical compounds. Even though pH, color, and the contents of trigonelline, caffeine, and chlorogenic acids differed significantly among the coffee extracts, no significant differences were observed in their antimicrobial activity. Caffeic acid and trigonelline showed similar inhibitory effect against the growth of the microorganisms. Caffeine, chlorogenic acid, and protocatechuic acid showed particularly strong effect against Serratia marcescens and Enterobacter cloacae. The IC50 and IC90 for the compounds determined by the microtiter plate method indicated that trigonelline, caffeine, and protocatechuic acids are potential natural antimicrobial agents against Salmonella enterica. The concentrations of caffeine found in coffee extracts are enough to warrant 50% of the antimicrobial effect against S. enterica, which is relevant to human safety.

Revue / Journal Title

Journal of agricultural and food chemistry    ISSN  0021-8561   CODEN JAFCAU 

Source / Source

2006, vol. 54, no23, pp. 8738-8743 [6 page(s) (article)] (38 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Chemical Society, Washington, DC, ETATS-UNIS  (1953) (Revue)

Mots-clés anglais / English Keywords

Concentration

;

Phenolic acid

;

Caffeine

;

Antimicrobial agent

;

Coffee

;

Chemical compound

;

Coffee extract

;

Antibacterial agent

;

Mots-clés français / French Keywords

Concentration

;

Acide phénolique

;

Caféine

;

Antimicrobien

;

Café

;

Composé chimique

;

Extrait café

;

Antibactérien

;

Mots-clés espagnols / Spanish Keywords

Concentración

;

Acido fenólico

;

Cafeína

;

Antimicrobiano

;

Café

;

Compuesto químico

;

Extracto café

;

Antibacteriano

;

Mots-clés d'auteur / Author Keywords

Coffee

;

antimicrobial activity

;

enterobacteria

;

trigonelline

;

caffeine

;

phenolic acids

;

inhibitory concentration

;

Localisation / Location

INIST-CNRS, Cote INIST : 7332, 35400015898639.0100

Nº notice refdoc (ud4) : 18275449



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