Abstract

CENTURION-HIDALGO, Dora et al. Antibacterial activity evaluation of hexanic extracts of edible palm inflorescenses of Tabasco's mountains, Mexico. Polibotánica [online]. 2013, n.35, pp.133-142. ISSN 1405-2768.

In order to search for prevention and treatment alternatives of food infections, the evaluation of the antibacterial activity of extracts of the palms Astrocaryum mexicanum Liebm. ex Mart. and Chamaedorea. cataractarum Mart. against three bacteria strains (Staphylococcus aureus ATCC 25923, Salmonella typhimurium ATCC 14028 and Bacillus cereus ATCC 11778) was performed. The edible part of each palm inflorescences were dried at 40°C for 48 h and grounded and stored for later study. Crude extracts obtained with ethanol or hexane, by 24 h maceration at room temperature were prepared. The antimicrobial activity was assessed using the agar diffusion method with crude extract impregnated discs. Determination of Minimum Inhibitory Concentration (MIC) was performed using the broth dilution method and the Minimum Bactericidal Concentration (MBC) by inoculating the dilutions without turbidity for bacterial colony presence searching. We found that the hexanic extract of C. cataractarum and A. mexicanum showed no activity against S. typhimurium. None of the ethanol extracts showed antibacterial activity with the tested concentrations. The MIC of C. cataractarum hexanic extract was 3.85 mg ml^-1for both B. cereus. Finally, it was found that ethanolic extracts of the studied species did not presented a MIC or MBC at the highest concentration tested (60 mg ml^-1).

Keywords : inflorescence; Astrocaryum mexicanum Liebm; ex Mart.; Chamaedorea cataractarum Mart.; Minimum Inhibitory Concentration; Minimum Bactericidal Concentration.

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