Antimicrobial Activity of Leaf Aqueous Extract of <i>Schinus polygamus</i> (Cav.) Cabrera against Pathogenic Bacteria and Spoilage Yeasts
Andrea Acuña-Fontecilla | Julio Bruna | María Angélica Ganga | Liliana Godoy
The antimicrobial activity of an aqueous extract of the leaves of <i>Schinus polygamus</i> (cav.) Cabrera against microorganisms of food importance was evaluated. First, the leaf aqueous extract of <i>Schinus polygamus</i> was characterized, quantifying hydroxycinnamic acids and phenolic compounds. Then, a battery of strains was tested, including <i>Escherichia coli</i> ATCC 25922, <i>Salmonella Typhimurium</i> ATCC 14028, and <i>Listeria monocytogenes</i> ATCC 13932. Also, we tested wine spoilage yeasts such as <i>Brettanomyces bruxellensis</i> LAMAP2480, <i>B. bruxellensis</i> LAMAP1359, <i>B. bruxellensis</i> CECT1451, and <i>Pichia guilliermondii</i> NPCC1051. Tests were conducted using the kinetic curve of growth and cell viability counts. The results indicate that with 10% <i>v</i>/<i>v</i> of concentrated extract, it is possible to observe growth inhibition of all microorganisms studied, with statistically significant differences during the whole measurement time (70 h for bacteria and 145 h for yeast).
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